A vessel contains 18.06*10^23 molecules of ammonia gas at 25°c. Calculate the number of hydrogen atoms present in the ammonia gas.
Answer:
Explanation:
Before you use log you have to multiply the answer of 8.66 mol by 6.02⋅1023 by 3 because the answer of 8.66 mol by 6.02⋅1023 gives you the number of ammonia molecules and in each molecules there are 3 hydrogen atoms present. So it is: 8.66⋅6.02⋅1023=5.21332⋅1024 5.21332⋅1024⋅3=1.563996⋅1025 log(1.563996⋅1025)=25.19
Answer:There are 5.418×10^24 hydrogen atoms present in the ammonia.
Explanation:
Ammonia (NH3) is a molecule that exists as a gas at Standard temperature (298 K). It contains atoms of Nitrogen and Hydrogen in atomic ratio of 1:3. We can represent it in equation as:
N2 + 3H2 <------> 2NH3
One molecule of NH3 contains one atom of Nitrogen (N) and three atoms of Hydrogen (H). That is 3 atoms of Hydrogen are present in every 1 molecule of NH3. We can as well say that 1 atom of Hydrogen is present in 1/3 molecule of NH3.
Number of NH3 molecules = 1/3 × number of hydrogen atoms
Number of NH3 molecules = 18.06 × 10^23 molecules at 25°C
18.06× 10^23 molecules = 1/3 × number of hydrogen atoms
Cross multiply,
Number of hydrogen atoms= 3× 18.06×10^23 molecules
Number of hydrogen atoms= 5.418×10^24 atoms
Therefore, there are 5.418×10^24 hydrogen atoms present in the ammonia.
Why is it important for the circulatory system to help your cells
Answer:
to provide energy to the body and helps u grow stonger
Explanation:
An object sliding along a horizontal table is an example of projectile motion.
A. True
B. False
Answer:
False
Explanation:
"Projectile motion is a form of motion experienced by an object or particle that is thrown near the Earth's surface and moves along a curved path under the action of gravity only. This curved path was shown by Galileo to be a parabola." -Wikipedia
The object does not take a parabolic trajectory through the air.
What are the three components of soil?
Answer:
The three components are:
Minerals.Organic matter.Living organisms.Explanation:
Soil is made up of three main components:
Minerals that come from rocks below different layers of the soil. Organic matter(humus) which is the remains of plants and animals that increases the fertility of the soil and also increases the water holding capacity of soil.Living organisms that reside in the soil.Result: The three main components of soil are minerals, organic matter, living organisms.
Soil is made up of three main components: inorganic minerals, organic matter, and a mixture of water and air, which are essential for plant life and soil processes.
The three main components of soil are inorganic minerals, organic matter, and a combination of water and air. These components are crucial in sustaining plant life and facilitating various biological processes. Inorganic minerals make up about 40 to 45 percent of soil volume and provide essential nutrients. Organic matter, which includes decomposing plant and animal residues, microorganisms, and living soil organisms, comprises about 5 percent of the soil volume. Lastly, water and air occupy the remaining 50 percent of soil volume, ensuring that plants receive the water needed for growth and air for root respiration.
why do elements undergo chemical reactions?
Answer:
They have to
Explanation:
It occurs when 2 or more molecules interact and their bonds change
Which of the following is a way that groundwater depletion affects streams? a. lower water level b. loss of vegetation c. wildlife disruption d. all of the above Please select the best answer from the choices provided A B C D i need awnser asap im on a timed test
Answer:
All of the above is a way in which groundwater depletion affects streams
Explanation:
Because of the excessive pumping it affects the groundwater level resulting in serious threat to the streams. Loss of the vegetation is the major cause for depletion of groundwater as it results in reducing the ability of the soil to hold on to the water. Evaporation of large tonnes of water affects the marine life, which extinct the various flora fauna fishes and other marine animals and plants. A huge amount of rain water is wasted every year due to the poor storage facility of water harvesting
Answer:
D
Explanation:
11. Weather-station measurements indicate
that the dewpoint temperature and air
temperature are getting farther apart
over the past 3 hours. The chance of
precipitation during this time span is
Final answer:
As the dew point and air temperature diverge, the air becomes drier, reducing the chance of precipitation since a significant drop in air temperature would be required to reach the dew point and initiate condensation.
Explanation:
When the dew point temperature and air temperature are getting farther apart, it indicates that the air is becoming less saturated with moisture. As the temperature drops without reaching the dew point, no condensation occurs. Hence, because the air is becoming drier, the chance of precipitation decreases.
The dew point is the temperature at which the air is completely saturated with moisture and condensation can begin. If the dew point is low, it means that the humidity is low, and there is less moisture available to form precipitation. Since the measurements indicate increasing separation between the dew point and air temperature, the likelihood of rain or snow decreases. This is because as the air temperature falls, it would have to drop a significant amount to reach the dew point and only then could condensation and precipitation potentially occur.
what is the percent yield of the reaction below when 544.5 g so2 and 160.0g o2 produce 382.0 g so3? 2SO2+O2+2SO3
Answer:
[tex]\large \boxed{56.1 \, \% }[/tex]
Explanation:
We have the masses of two reactants, so this is a limiting reactant problem.
We will need a balanced equation with masses and molar masses of the compounds involved. Gather all the information in one place
Mᵣ: 64.06 32.00 80.06
2SO₂ + O₂ ⟶ 2SO₃
m/g: 544.5 160.0
1. Theoretical yield
(a) Calculate the moles of each reactant
[tex]\text{Moles of SO}_{2} = \text{544.5 g} \times \dfrac{\text{1 mol}}{\text{64.06 g }} = \text{8.500 mol}\\\\\text{Moles of O} _{2}= \text{160.0 g} \times \dfrac{\text{1 mol}}{\text{32.00 g}} = \text{5.000 mol}[/tex]
(b) Identify the limiting reactant
Calculate the moles of SO₃ we can obtain from each reactant.
From SO₂:
The molar ratio of SO₂ to SO₃ is 2:2
[tex]\text{Moles of SO}_{3} = \text{8.500 mol SO}_{2} \times \dfrac{\text{2 mol SO} _{3}}{\text{2 mol SO}_{2}} = \text{8.500 mol SO}_{3}[/tex]
From O₂ :
The molar ratio of SO₂:O₂ is 2 mol O₂:1 mol O₂.
[tex]\text{Moles of SO$_{3}$} = \text{5.000 mol O}_{2} \times \dfrac{\text{2 mol SO$_{3}$}}{\text{1 mol O$_{2}$}} = \text{10.00 mol SO$_{3}$}[/tex]
The limiting reactant is SO₂ because it gives the smaller amount of SO₃.
(c) Calculate the theoretical yield of SO₃.
[tex]\text{Theor. yield of SO}_{3} = \text{8.500 mol} \times \dfrac{\text{80.06 g}}{\text{ 1 mol}} = \text{680.5 g}[/tex]
2. Calculate the percent yield of SO₃
[tex]\text{\% yield} = \dfrac{\text{ 382.0 g actual}}{\text{680.5 g theor,}} \times 100 \, \% = \textbf{56.1 \%}\\\\\text{The percent yield is $\large \boxed{\mathbf{56.1 \, \% }}$}[/tex]
2. Part 3: Double-Displacement Reactions: For each double-displacement reaction, describe what happened in each well, including the colors of any products that formed. If a chemical reaction occurred, write a balanced equation for it. Then use the A, B symbols to write a general equation for a double-displacement reaction. Here are the chemical formulas of the reactants for each reaction:
• sodium chloride – NaCl
copper sulfate – CuSO4
• sodium hydroxide – NaOH
copper sulfate – CuSO4
• sodium phosphate – Na3PO4
copper sulfate – CuSO4
• sodium chloride – NaCl
silver nitrate – AgNO3
• sodium hydroxide – NaOH
silver nitrate – AgNO3
• sodium phosphate – Na3PO4
silver nitrate – AgNO3
Answer: General equation for Double Replacement Reactions is:
AY+BX→BY+AX
Explanation:
2NaCl+CuSO4→Na2SO4+CuCl2
2NaOH+CuSO4→Na2SO4+Cu(OH)2
2Na3PO4+2CuSO4→Cu3(PO4)2+3Na2SO4
NaCl+AgNO3→AgCl+NaNO3
2NaOH+2AgNO3→2NaNO3+Ag2O+H2O
Na3PO4+3AgNO3→3NaNO3+Ag3PO4
Final answer:
In double-displacement reactions involving the given reactants, various colored precipitates form, indicating a chemical reaction. The general equation for a double-displacement reaction is provided.
Explanation:
Double-displacement reactions:
NaCl + CuSO4: White precipitate of CuCl2 forms.
NaOH + CuSO4: Blue precipitate of Cu(OH)2 forms.
Na3PO4 + CuSO4: Light blue precipitate of Cu3(PO4)2 forms.
NaCl + AgNO3: White precipitate of AgCl forms.
NaOH + AgNO3: Brown precipitate of AgOH forms.
Na3PO4 + AgNO3: Yellow precipitate of Ag3PO4 forms.
General equation for double-displacement reaction: AB + CD → AD + CB
Which solution is the most concentrated?
2.0 mL of 10 M H2SO4, where H2SO4 has a molar mass of 98 g/mol
5.0 mL of 1.0 M PbSO4, where PbSO4 has a molar mass of 303 g/mol
2.0 mL of 10.5 M H2O2, where H2O2 has a molar mass of 34 g/mol
100 mL of 10 M NaCl, where NaCl has a molar mass of 58 g/mol
Answer:
2.0 mL of 10.5 M H2O2, where H2O2 has a molar mass of 34 g/mol.
Explanation:
It is most concentrated because it contains 10.5 M of Hydrogen peroxide.
Answer:100 mL of 10 M NaCl, where NaCl has a molar mass of 58 g/mol
Explanation:
Concentration refers to the amount of substance in moles present in a solution. Number of moles is obtained from; number of moles= concentration*volume
For our chosen answer, 100/1000 * 10=1 mole. If we follow this procedure to calculate the amount of other solutions stated in the question, we will realize that 100ml of 10M NaCl has the highest number of moles present. Since concentration has to do with the number of moles present in a solution, this is the most concentrated solution.
Burning gasoline is an _____________ reaction.
The diagram below shows some ocean floor features. Which of these statements best compares Feature A and Feature B? (2 points) Question 12 options: 1) Feature A is a guyot and Feature B is a seamount. 2) Feature B is a guyot and Feature A is a seamount. 3) Feature A is an abyssal plain and Feature B is an ocean trench. 4) Feature B is an abyssal plain and Feature A is an ocean trench.
3) Feature A is an abyssal plain and Feature B is an ocean trench.
Explanation:
Looking at the attached image, we can see that feature A is an abyssal plain and feature B is an oceanic trench. This picture is topographic profile which shows the different parts of an ocean as we move from the shelf to the trenches.
Abyssal plain is found on the ocean floor where we have ocean flat and rich sediment fines. This is the part labelled A. Part B is the deep oceanic trench usually found around subduction zones where two plates are colliding and one goes beneath the other. Abyssal plains are prominent along divergent margins as plates spreads away.learn more:
sea floor spreading
#learnwithBrainly
Answer:
Option 3
Explanation:
I got it right on the test.
Hope this helped.
1) Hydrogen and oxygen react to form water.
A) Write the complete balanced equation.
B) If 11 moles of hydrogen react with 11 moles of oxygen which of these is the limiting reagent? Show work or explain how you know.
C) What is the maximum amount of water (in grams) that can be produced given 11 moles of hydrogen and 11 moles of oxygen? Show work.
2) Sodium reacts with oxygen to produce sodium oxide as described by the balanced equation below. If 34.6g of sodium reacts with excess oxygen gas to produce 41.8g of sodium oxide, what is the percent yield? Show all work. (hint: be sure to calculate theoretical yield first)
4Na + O2 --> 2Na2O
Answer:
1)
A) The balanced equation is (1):
(1) [tex]2H_2 +O_2[/tex] ⇒ [tex]2H_2O[/tex]
B) The limiting reagent is the Hydrogen. There is a simple rule to identify the limiting reagent. the explanation is shown below
C) The maximum amount of water produced is given by the limiting reagent (hydrogen) and this quantity is 198g of water
2)
The percent yield is 89.65%
Explanation:
A) In this case you must take into account that the molecules involved in the reaction are oxygen and hydrogen in its diatomic form. This is because the monoatomic form is unstable in nature or said in another way, both oxygen and hydrogen are only found in nature in diatomic form.
In that order of ideas, you can pose the following equation:
(2) [tex]H_2 +O_2[/tex] ⇒ [tex]H_2O[/tex]
The equation (2) is not balanced, for that reason you should balance the amount of atoms of each element. I suggest start balancing oxygen and then balance the hydrogen. If you do that, the result will be equation (1).
B) The rule to identify the limiting reagent is the following:
Once you balance the equation, identify the stoichiometric coefficient of each reagent Divide the amount of moles provided in the problem by the stoichiometric coefficient. You have to do that for each reagent involved in the reaction.In this case you have:
[tex]oxygen: \frac{11mol}{1mol} =11[/tex]
[tex]hydrogen: \frac{11mol}{2mol} =5.5[/tex]
The limiting reagent correspond to the smallest value calculated; in this case, the hydrogen.C) If you want to calculate the amount of water produced you need the equation balanced. Take into account that the maximum amount produced of a product is given by the limiting reagent.
If you don´t understand the concept of limiting reagent, I invite you to analyze the following example:
You want to prepare sandwiches. To prepare a single sandwich you need two slices of bread and a slice of cheese. If you have 6 slices of bread and 6 slices of cheese, how many sandwiches can you prepare?. The answer is 3; as you can see in the example, the slices of bread limit the amount of sandwiches that you can prepare because if you do not have more bread, you can not prepare a sandwich. Let's assume now that you have 6 slices of bread and 2 slices of cheese. In this case, the limiting reagent is the cheese and there are 2 slices of bread leftover.Continuing with the calculations, take into account that this should be based on the hydrogen (the limiting reagent). The procedure is shown below:
(3) [tex]11molH_2*\frac{2molH_2O}{2molH2}*\frac{18gH_2O}{1molH_2O} =198g[/tex]
Note that the excercise provide 11 moles of the limiting reagent (hydrogen). You should relate the amount of moles of hydrogen with the amount of moles of the product (water). To do so, you have to identify the stoichiometric coefficient in the reaction for both the hydrogen and the water (remember, the equation should be balanced). Finally, the molecular weight of the water relate the amount of moles with its mass.
2) First of all, you must verify if the equation is balanced. Once the equation is balanced you must calculate the theoretical yield.
To do so, you assume that all the limiting reagent is consumed to form the product (sodium oxide in this case).
Take into account that the limiting reagent is the sodium because the reaction is carried out with excess oxygen
The procedure is similar to the one shown in equation (3), but now you have mass instead of moles; this implies that first of all you have to transform the mass to moles :
[tex]34,6gNa*\frac{1molNa}{23gNa}=1.504molNa[/tex]
Note that 23 is the molecular weight of the sodium.
Once you calculate the amount of moles of limiting reagent, follow the procedure in equation (3):
(4) [tex]1.504molNa*\frac{2molNa_2O}{4molNa}*\frac{62gNa_2O}{1molNa_2O}=46,624gNa_2O[/tex]
46,624g is the theoretical yield of the reaction. The experimental yield of the reaction is given by the excercise, note that the problem state that 34.6 g of sodium produce 41.8g of sodium oxide.
The percent yield is calculated using equation (5)
(5) [tex]percent yield=\frac{ExperimentalYield}{TheoreticalYield}*100[/tex]
Replacing in equation (5) you have:
[tex]%yield=\frac{41.8}{46.624}*100=89.65[/tex]
key concept: The experimental yield can never be greater than theoretical yield, for that reason the percent yield is always lower than 100%. If the percent yield calculated is greater than 100 you should check carefully the procedure.
Can I please get help? Im not sure
Answer:
(3) Equals the mass of CaO plus the mass of CO₂
Explanation:
The important principle to remember is the Law of Conservation of Mass — the total mass of the reactants must equal the total mass of the products.
Reactants ⟶ products
CaCO₃ ⟶ CaO + CO₂
Mass of CaCO₃ = Mass of CaO + mass of CO₂
An atom with an atomic number of 11 will have how many electrons in its outermost orbit
Answer:
1 electron
Explanation:
Since this substance is the in the first column in the periodic table, hence it would have 1 electron in its outermost ring
Describe three situations where having cops puts young children at risk of other injuries
Explanation:
1. Tear gas, might shoot at protesters, may hit unsuspecting innocent bystander.
2 Hostage situation with armed subject who has child as hostage.
3. Raiding a house or location with armed suspect in vicinity or area who could possibly
Which type of force occurs between two objects at a distance?
Answer:
Gravitational force of attraction.
Explanation:
When two bodies of masses 'm' and 'M' are separated by a distance 'r', then both the bodies experience a force of attraction towards each other. This force of attraction is called gravitational force. It is a weak force but it always act between two bodies that have mass.
The magnitude of the gravitational force is directly proportional to product of the masses and inversely proportional to the square of the distance between the masses.
This means that as the distance between the bodies is increases, the gravitational force between the bodies decreases and vice versa.
The gravitational force of attraction is given as:
[tex]F_g=\frac{GmM}{r^2}\\\\G\to \textrm{Universal Gravitational constant}[/tex]
Answer:
Its not gravitational force its Non contact force
Explanation:
Because noncontact force acts at a distance just like contact force acts in contact.
which group in the periodic table has most active metal and why?
Answer:
the most reactive element in the periodic table are alkali metals (metals of the first group in the periodic table). They have one electron in the last energy level and easily react, they easily release the electron.
Explanation:
What’s this chemthink answer
Answer:
option A: Allow some of the helium to leak out in the air
option B: place the tank outside on a cold winter day
Explanation:
To choose the correct answer we will check each option one by one
option A:
Allow some of the helium to leak out in the air
The pressure will be decrease inside the tank when volume of gas in the container decrease. as we leak the helium gas from tank the number of molecules in the tank decreases that exert pressure on the wall of the container.
option B:
place the tank outside on a cold winter day
when we keep the tank in cold winter the kinetic energy of the molecules of the gas reduces also upon cooling the inter-molecular forces start operating and it decrease the collision of molecules with wall of the container and pressure inside tank decreases.
option C:
Place the tank in the trunk of a car on a hot summer day
when we keep the tank in the trunk of a car on a hot summer day the kinetic energy of the molecules of the gas increases and also upon increased temperature inter-molecular forces decrease and molecule move apart so the collision of molecules with wall of the container increases and pressure inside tank also increases.
option D:
Add more helium atoms to the tank
if we increases the volume of the gas in the container by adding more atoms in the tank it increases the pressure inside the tank and exert more pressure on the wall of the container so pressure inside the tank increase
So,
only option A and B is correct.
Without the context of the Chemthink problem you're facing, it's tough to provide an exact answer. Regardless, your answer should be grounded in fundamental chemistry principles, and remember that accuracy is vital in any calculations you might have to make.
Explanation:It's challenging to provide an exact answer without the context of the Chemthink problem that you are working on. Chemthink is an online platform that helps students learn various aspects of Chemistry. However, regardless of the question, your answer in Chemthink should be based on fundamental principles of Chemistry such as the Periodic Table, chemical bonds, reactions, etc. Ensure to recall these principles when answering questions. You might have to carry out some calculations, so accuracy is crucial. This answer would ideally be based on providing step-by-step solutions to the given problem or explaining a particular concept in a manageable way.
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when solving for concentration, you divided mass by:
1.)weight
2.)volume
3.)distance
Answer:2)volume
Explanation:
Answer:
Volume.
Explanation:
Concentration is defined as the ratio between the amount of substance in terms of mass units or moles and the volume or mass of a solution. There are many ways to look at it.
1. Molarity: it's the measure of concentration expressed as moles of solute divided by the volume of the solution in liters (mol/L units, or M);
2. Molality: the measure of concentration expressed as moles of solute divided by the mass of solvent in kilograms (mol/kg units, or m);
3. Percent mass: the measure of concentration expressed as mass of the component divided by the total mass of the mixture (%w/w, or simply %);
4. Percent volume: similar to percent mass, but in this case we divide the volume of the component by the volume of the mixture (%V/V);
5. Mole fraction: this is the ratio between the moles of component and the total moles of all the components present in the mixture (dimensionless, but might be expressed as percentage if needed).
As you can see, concentration can be expressed very differently. What unites all of these concepts is the fact that we're looking at a fraction of the solute/component with respect to the total mass/volume of the solution or the mixture.
Typically, we're interested in molarity, as it's used most often, that is, the ratio between the moles and volume. Remembering that moles is directly proportional to mass (moles are equal to mass divided by molar mass), we may also measure concentration as mass/volume fraction instead of moles/volume.
4. Hydrogen Bonds are not as strong as covalent or ionic bonds. T F
5. An example of solute would be
a. Plant in a vase
b. Kool aid in water
c. Cream in a donut
Answer:
4.TRUE
5.b).Kool aid in water
Explanation:
Ionic Bonds : These types of bonds are formed by complete transfer of electron from atom to other.Atom which give electron get positive Charge and which gains electrons get negative charge.
Strong electrostatic force between oppositively charged ions make these bonds very strong
Covalent Bond : These bonds are formed by sharing of electrons.The electron density of on atom is attracted towards the nucleus of other atom.
Covalent bonds are weaker than ionic bonds
Hydrogen Bonds : These bonds are formed by weak dipole-dipole interactions which occur when Hydrogen atom in a molecule is bonded to the highly electronegative atom.
These are very weak bonds, weaker than covalent,ionic bonds.
5.
Solute : In mixture(e.g Salt + water) , the substance that is present in less quantity is called solute(Salt).
Kool Aid : Powder Substance that is added in water / liquids to make flavoured soft drinks.
We , add small amount of Powder in large quantity of water . So Kool Aid is the solute
why does barium have a lower ionization energy than magnesium
Magnesium has a higher ionization energy than barium due to its smaller atomic radius and stronger nuclear charge. The smaller the atomic radius and the greater the nuclear charge, the more tightly the electrons are held. Therefore, it requires more energy to remove an electron from a magnesium atom than from a barium atom.
Explanation:Magnesium has a higher ionization energy than barium because magnesium has a smaller atomic radius and a stronger nuclear charge compared to barium. The smaller the atomic radius and the greater the nuclear charge, the more tightly the electrons are held, resulting in a higher ionization energy. For example, magnesium has a smaller atomic radius (145 pm) and a higher nuclear charge (positive charge from 12 protons) compared to barium with a larger atomic radius (222 pm) and a lower nuclear charge (positive charge from 56 protons). Therefore, it requires more energy to remove an electron from a magnesium atom than from a barium atom, resulting in a higher ionization energy for magnesium.
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A process through which an entire room could be warm by turning on the oven and opening the oven door is
A. Radiation
B. Conduction
C. Convection
D. Brownian motion
If you could answer and explain why that is the answer that would be great, if not it’s fine :)
Final answer:
The warming of a room by an oven is because of convection, which is the movement of warm air that distributes heat throughout the space. Conduction occurs during direct contact with the heat source, while radiation happens when heat travels through a vacuum or air without the necessity for a medium. So the correct option is C.
Explanation:
The process through which an entire room could be warmed by turning on the oven and opening the oven door is convection. This is because convection is the heat transfer by the macroscopic movement of a fluid, which in this case, is the air in the room. As the oven heats the air close to it, this warm air rises and cooler air moves in to take its place, setting up a circulation pattern that distributes the heat throughout the room.
Latent heat is transferred into the air by none of the above options, as latent heat is associated with phase changes, such as water evaporating or condensing, not directly with convection, conduction, or radiation.
Heat transfer by circulation of a fluid is called convection. In the case of heat transfer from a fire or the Sun, where there is no material medium, radiation is the form of heat transfer. Lastly, when there is direct contact between the source and an animal, the method of heat exchange that occurs is conduction.
A sample of copper with a mass of 63.5g contains 6.02 x10^23 atoms calculate the mass of an average copper atom
Answer:
The mass of an average copper atom is [tex]1.0548\times 10^{-22}\ g[/tex]
Explanation:
Given:
The total mass of copper atoms, [tex]m = 63.5\ g[/tex]
Number of atoms, [tex]N=6.02\times 10^{23}[/tex]
Now, we are asked to find the mass of 1 copper atom.
We use unitary method to find the mass of 1 copper atom.
Mass of [tex]N[/tex] atoms = m
∴ Mass of 1 atom = [tex]\frac{m}{N}[/tex]
Plug in 63.5 for 'm', [tex]6.02\times 10^{23}[/tex] for 'N' and simply.
Mass of 1 atom = [tex]\dfrac{63.5}{6.02\times 10^{23}}=1.0548\times 10^{-22}\ g[/tex]
Therefore, the mass of an average copper atom is [tex]1.0548\times 10^{-22}\ g[/tex]
The mass of an average copper atom is approximately 1.055 x 10^-22 g.
Explanation:To calculate the mass of an average copper atom, we can use the given information that a sample of copper with a mass of 63.5 g contains 6.02 x 10^23 atoms. We can set up a proportion with the mass and the number of atoms:
63.5 g / 6.02 x 10^23 atoms = x g / 1 atom
Solving for x, we find that the mass of an average copper atom is approximately 1.055 x 10^-22 g.
Metallic Properties: Copper is a metal, and as such, it exhibits typical metallic properties. It is a good conductor of electricity and heat, has a metallic luster, is malleable and ductile, and forms positive ions (Cu^+) in chemical reactions.
Oxidation States: Copper can exist in different oxidation states, with the most common ones being +1 (cuprous) and +2 (cupric). The oxidation state depends on the specific chemical environment.
Density and Melting Point: The density of copper is approximately 8.96 grams per cubic centimeter, and it has a melting point of about 1,984 degrees Celsius (3,603 degrees Fahrenheit).
These characteristics contribute to the overall understanding of the behavior and properties of a typical or average copper atom. Keep in mind that specific conditions, such as temperature and pressure, can influence certain properties of atoms and elements.
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Find the GPE of 40,000 kg airplane moving at 80 m/s at 200 meter above the ground.
Answer:
The airplane gravitational potential energy is 78.4 MJ.
Explanation:
Given:
Mass of airplane, m = 40000 kg
Height above ground , h = 200 m
To Find:
Gravitational Potential Energy = ?
Solution:
Gravitational Potential Energy :
Gravitational potential energy is energy an object possesses because of its position in a gravitational field.
Formula is given by
[tex]\textrm{Gravitational Potential Energy}= m\times g\times h[/tex]
Where,
m = mass
g = acceleration due to gravity = 9.8 m/s²
h = height
Substituting the values we get
[tex]\textrm{Gravitational Potential Energy}= 40000\times 9.8\times 200\\\\\textrm{Gravitational Potential Energy}=78400000=78.4 Mega Joules[/tex]
The airplane gravitational potential energy is 78.4 MJ.
PLSS HELP I'm really stuck!
How would you make a 500.0ml of stock solution of 6.0M of NAOH. Explain in detail with words and support with calculations.
Answer:
The steps are explained below, the essential step is to find mass here, 120 g of NaOH.
Explanation:
In order to answer this question, we need to define molarity conceptually firstly to see what variables we need. According to the formula, molarity is equal to the ratio between moles and volume, while moles itself is a ratio between mass and molar mass. This means we have a formula for molarity involving mass, molar mass and volume:
[tex]c = \frac{n}{V} = \frac{m}{MV}[/tex]
In order to prepare a 500.0 mL of stock solution of 6.0 M of NaOH, we then need to find the mass of NaOH dissolved in this solution using the equation above:
[tex]m = cMV = 6.0 M\cdot 39.997 g/mol\cdot 0.5000 L = 120 g[/tex]
Now, since we have the mass of NaOH, we can describe the steps needed to prepare this solution:
measure 120 grams of solid NaOH;add this mass of NaOH into a 500.0-mL Erlenmeyer flask;fill approximately half of the flask with distilled water and stir gently to make sure that NaOH dissolves, if it doesn't, add more water and repeat the process;when NaOH fully dissolves, fill the flask to the mark.Our solution is prepared.
Compare and contrast the movement of water molecules when water is in a solid liquid or gaseous state.
Answer:
In gaseous form their movement is much faster as compared to liquid and solid state.
Explanation:
The water molecules move very fast when they have high kinetic energy and their K.E is increases by heating.
Water as solid:
In solid form consider the ice, water molecules can not move because they are packet tightly.
Any substance in solid form can not move because of compactness of structure.
Water as liquid:
In liquid form water molecules can flow and move because molecules are not tightly held like in solid form. But their movement not much faster like in case of gaseous state.
Water as gas:
When water is heated at high temperature molecules are converted into gaseous form. Their movement is much faster as compared to liquid and solid state.
In solid ice, molecules form a structured arrangement and are less dense due to hydrogen bonds spacing them apart. In liquid water, molecules have higher kinetic energy, move freely, and form and break hydrogen bonds constantly. As a gas, water molecules have enough energy to completely break hydrogen bonds and fill any available space.
Explanation:Comparing Water Molecule Movement in Different States
Water molecules exhibit different behaviors based on the state of matter they are in—solid, liquid, or gas. In a solid state such as ice, water molecules form a crystalline structure maintained by hydrogen bonds. These molecules do not circulate; they vibrate around fixed positions, giving ice its rigid structure. Despite this fixed arrangement, ice is less dense than liquid water because the molecules are pushed farther apart.
In the liquid state, water molecules have higher kinetic energy than in the solid state, allowing them to move freely and slide past each other. This movement facilitates the constant formation and breaking of hydrogen bonds, contributing to the fluidity of water. As opposed to solids, liquid water conforms to the shape of its container but maintains a surface.
When water is in the gaseous state, as water vapor or steam, the kinetic energy is high enough to break hydrogen bonds entirely. Water molecules in this state move about with the highest kinetic energy and are not confined to a volume or shape, allowing them to expand and fill the available space.
These behaviors of water molecules closely relate to temperature changes, with heating increasing kinetic energy and cold reducing it, affecting the state of water and its properties.
What is the formula unit for an ionic compound
containing only barium (Ba) and sulfate (SO4) ions?
recall how Newton's investigation of light followed one form of scientific method
Newton's investigation of light followed a method similar to the scientific method. He hypothesized that light was composed of particles, conducted experiments, particularly with prisms to decompose and recombine light, to test this hypothesis and concluded that light was indeed made of particles.
Explanation:Newton's investigation of light followed a structured methodology that is similar to what's known as the scientific method today. This method involves establishing a problem, forming a hypothesis, conducting experiments to test the hypothesis, analyzing the results and forming a conclusion. In the case of Newton's study on light, he began by identifying a problem: the understanding of the nature of light. He formed a hypothesis that light was composed of particles.
To test this hypothesis, he conducted a variety of experiments, the most famous of which involved passing sunlight through a prism to decompose it into a spectrum of different colors. He observed that the different colors could be recombined to form white light again using another prism which refutes the accepted belief at that time that color is added to light by the prism. Based on his experiments, Newton concluded that light is indeed made up of particles, later to be known as corpuscles.
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Final answer:
Newton's investigation of light using the scientific method demonstrated reproducibility and articulate logical conclusions, leading to advancements like the discovery of infrared and ultraviolet light, and the creation of the Newtonian telescope.
Explanation:
Isaac Newton's investigation of light exemplifies the scientific method through two key attributes: reproducibility and the clear articulation of observations and logical conclusions. The reproducibility of his work allowed others to confirm and extend his findings, such as William Herschel's discovery of infrared light and Johann Ritter's detection of ultraviolet light, using Newton's experimental methods. Newton's approach also included making explicit predictions, verifying them empirically, and offering theoretical explanations based on his observations on how different colors of light interacted with matter.
His insights on light lead to the adaptation of mirrors instead of lenses in telescopes to avoid color distortions, which was applied in his own reflecting telescope design. Newton's work on light and his laws of motion and gravitation also involved expressing experimental results using mathematics, highlighting the interplay between empirical data and theoretical work in the progression of scientific understanding.
Which cell structure do nutrients pass through to enter a cell?
Nutrients can enter cells through different mechanisms depending on their solubility. Lipid-soluble nutrients can diffuse through the plasma membrane, while water-soluble nutrients require transport molecules embedded in the membrane.
Explanation:Lipid-soluble nutrients can diffuse through the plasma membrane, while water-soluble nutrients require transport molecules embedded in the membrane to enter cells. Once inside the cell, lipid-soluble nutrients are packaged for transport via the base of the cell, while water-soluble nutrients enter the capillary blood in the villi and travel to the liver.
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