The correct order for the first three steps of the scientific method is:D. State the question, form a hypothesis, conduct an experiment.
Here is a step-by-step explanation:
1. State the question: This is the first step in the scientific method. It involves identifying a problem or question that you want to investigate. It is important to clearly define the question you want to answer through your experiment.
2. Form a hypothesis: After stating the question, you need to come up with a hypothesis. A hypothesis is an educated guess or prediction that explains the relationship between the variables being studied. It is usually stated as an "if-then" statement, where you propose that if a certain condition is met, then a specific outcome will occur.
3. Conduct an experiment: Once you have a hypothesis, you can design and carry out an experiment to test it. An experiment involves systematically manipulating and controlling variables to observe their effects and gather data. It is important to carefully plan and conduct the experiment to ensure reliable and valid results.
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Which substances have AH = 0 kJ/mol
Answer:
Oxygen, bromine, iron, helium
Explanation:
[tex]\Delta H^o_f[/tex] is defined as the standard enthalpy of formation. By definition, the standard enthalpy of formation is equal to 0 kJ/mol for the substances in their standard states, that is, at room temperature and 1 atm pressure.
Simply speaking, looking at the substances given, we need to understand whether their states agree with what we expect to see at standard conditions (e. g., sodium is a metal, fluorine is a gas, bromine is a liquid at standard conditions). Those are substances consisting of just one type of atoms.
Firstly, oxygen is a gas at standard conditions and it is diatomic, so its [tex]\Delta H^o_f=0 kJ/mol[/tex].Although nitrogen is a gas at standard conditions, it is diatomic, so [tex]\Delta H^o_f\neq 0 kJ/mol[/tex].Water is a liquid at standard conditions, however, it consists of two types of atoms, hydrogen and oxygen, so [tex]\Delta H^o_f \neq 0 kJ/mol[/tex].Bromine is a liquid at standard conditions, so [tex]\Delta H^o_f=0 kJ/mol[/tex].Iron is a solid at standard conditions, it's a metal, so [tex]\Delta H^o_f=0 kJ/mol[/tex].Helium is a gas at standard conditions, it belongs to noble gases, so [tex]\Delta H^o_f=0 kJ/mol[/tex].Sulfur is a solid at room conditions, however, the conformation it has is [tex]S_8[/tex] and not [tex]S_6[/tex], so [tex]\Delta H^o_f\neq 0 kJ/mol[/tex].
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why the total energy of electron is negative
Answer:
Electrons are always marked negative Hence electronic energy is also always taken as negative. It is because when an electron is at infinite distance from nucleus , there the kinetic energy of that electron can not be calculated. So, it is taken to be zero . ... And thus the energy of electron becomes less negative
When dissolved in water, acids produce ____.
Answer:
Acids when dissolved in water produce hydrogen ions.
Explanation:
Determine how many moles of KNO3 are created if 0.03 moles of Kl are completely consumed
Directly determining the number of moles of KNO3 formed from KI is not feasible without a specific chemical reaction pathway, as KI typically does not directly convert into KNO3.
Explanation:To determine the number of moles of KNO3 created when 0.03 moles of KI is completely consumed, we need a balanced chemical equation for the reaction involving KI and how it transforms into KNO3. Unfortunately, without a specific chemical reaction indicating how KNO3 is formed from KI, accurately calculating the moles of KNO3 produced directly from KI is challenging since KI typically does not transform directly into KNO3 through a simple chemical reaction. In typical laboratory or industrial settings, KNO3 is formed through different chemical pathways that do not directly involve KI as a reactant.
To determine the moles of KNO3 created from 0.03 moles of KI consumed,
Write and balance the chemical equation representing the reaction between KI and KNO3.
Use stoichiometry to calculate the moles of KNO3 formed from the moles of KI consumed.
Apply the coefficients of the balanced equation to convert moles of KI to moles of KNO3.
Therefore, without the explicit chemical reaction provided, we can conclude that the direct transformation from KI to KNO3, leading to a calculation of moles of KNO3 produced from a given amount of KI, is not standardly feasible. For accurate calculations, the exact chemical equation is necessary.
What effect does the speed of molecules have on matter? (ANSWER AS QUICKLY AS POSSIBLE PLZ & EARN 40 POINTS)
A. It helps figure out the matter’s density.
B. It controls the matter’s weight.
C. It determines the mass of the matter.
D. It determines what state the matter is in.
Answer: D is the right option
Explanation: if the speed of the molecules are randomly fast that they are only restricted by the wall of the container, it therefore means that the matter is in gaseous state. If the speed are fast to an extent that they transfer heat to another thereby making them fast to move about, the matter is in liquid state. But when the molecules only vibrate about a fixed point, the matter is in solid state
The correct answer is D. It determines what state the matter is in.
The particular state in which matter is is dependent on the sped of the molecules hat compose matter.
Matter is composed of small particles called molecules. These molecules are in constant motion and bump into each other frequently.
In solids, the molecules that compose matter only vibrate or rotate about a fixed position.
In liquids, the molecules that compose matter can move about at low speed.
Molecules of a gas move at high speed. We can see that the particular state of matter is defined by the speed of the molecules that compose it.
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What are the coefficients for the reaction _C12O5 + _H20 - _HCIO3 once it is balanced?
O 1, 1, 1
1, 1, 2
O 1, 2, 2
2, 1, 1
Answer:
b) 1,1,2
Explanation:
Cl2O5 + H2O → 2 HClO32 - Cl - 2
6 - O - 6
2 - H - 2
by semireactions, the chloride ion (Cl) is balanced with HClO3 and the oxygen is balanced with water:
Cl2O5 + H2O → 2 HClO3
SC.8.P.8.5, SC.8.P.8.8
2. The ammonia molecule (NH) is polar. Which
statement is NOT true about ammonia?
A. It contains polar bonds.
B. It contains covalent bonds.
C. Electrons are evenly shared among the
atoms.
D. The charges on the polar bonds are
arranged so that they are balanced.
Answer:
the wrong option is The charges on the polar bonds are
arranged so that they are balanced.
Explanation:
if an electron is more electro negative it has more tendency to pull the valence electron towards itself.
electronegativity is the measure of the tendency of an atom to attract bonding pair of electron towards itself.
electro negativity increases along the group and decreases down the group.
nitrogen is more electronegative than hydrogen so it will tend to attract the bonding pair of electron towards itself.
therefore electrons are not evenly shared between the atoms
Answer:
Electrons are evenly shared among the
atoms.
Explanation:
all the others are obviously wrong
Consider the hall reactions below for a chemical reaction
ZnZn2+ (aq) + 2e
Cu?" (aq) + 2e" - Cu(s)
What is the overall equation for this chemical reaction?
Zn(s) + Cu2+ (aq) -- Zn2+ (aq) + Cu(s)
Zn(s) + Cu2+ (aq) Cu* (ag)+ 2e"
Zn2+ (aq) + Cu(s) Cu(aq) + Zn(s)
Zn2+ (aq) + 2e" - Cu2(aq) + 2e
Zn + Cu²⁺ → Zn²⁺ + Cu
Explanation:
The overall equation of this redox reaction is combination of the two half equations. The similar species on both sides are cancelled out leaving a net overall reaction:
Zn → Zn²⁺ + 2e⁻ oxidation step
Cu²⁺ + 2e⁻ → Cu reduction step
Combining both equations:
Zn + Cu²⁺ + 2e⁻ → Zn²⁺ + 2e⁻ + Cu
since the common specie on both sides is 2e⁻, they cancel out to give an overall reaction:
Zn + Cu²⁺ → Zn²⁺ + Cu
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Final answer:
The overall equation for the displacement reaction where zinc replaces copper is Zn(s) + Cu2+ (aq) → Zn2+ (aq) + Cu(s).
Explanation:
The question concerns the determination of the overall chemical reaction for a displacement reaction where zinc displaces copper from its solution. Starting from the half-reactions, the oxidation half-reaction is Zn(s) → Zn2+(aq) + 2e-, which indicates zinc is being oxidized by losing electrons. The reduction half-reaction for copper is Cu2+(aq) + 2e- → Cu(s), showing that copper ions are being reduced by gaining electrons. When we combine these two half-reactions, we must ensure that the electrons lost by zinc equal the electrons gained by copper to balance the reaction. Thus, the overall reaction is Zn(s) + Cu2+ (aq) → Zn2+ (aq) + Cu(s). This equation represents a single displacement reaction where zinc metal is transformed into its ionic form and copper ions are deposited as copper metal.
a 5L container contains 3 moles of helium and 4 moles of hydrogen at a pressure of 9 atms maintaining a constant T and additional 2 mol or hydrogen are added.... what is the new partial pressure of hydrogen gas in a container
Answer:
7.71 atm
Explanation:
Given the following data:
[tex]V = 5 L[/tex]
[tex]n_{He} = 3 mol[/tex]
[tex]n_{H_2} = 4 mol[/tex]
[tex]p_1 = 9 atm[/tex]
[tex]T = const[/tex]
According to the ideal gas law, we know that the product between pressure and volume of a gas is equal to the product between moles, the ideal gas law constant and the absolute temperature:
[tex]pV = nRT[/tex]
Since the temperature and the ideal gas constant are constants, as well as the fixed container volume of 5 L, we may rearrange the equation as:
[tex]\frac{p}{n}=\frac{RT}{V}=const[/tex]
This means for two conditions, we'd obtain:
[tex]\frac{p_1}{n_1}=\frac{p_2}{n_2}[/tex]
Given:
[tex]p_1 = 9 atm[/tex]
[tex]n_1 = n_{initial total} = n_{He} + n_{H_2} = 3 mol + 4 mol = 7 mol[/tex]
[tex]n_2 = n_{final total} = n_{He} + n_{H_2} = 3 mol + 4 mol + 2 mol = 9 mol[/tex]
Solve for the final pressure:
[tex]p_2 = p_1\cdot \frac{n_2}{n_1}[/tex]
Now, according to the Dalton's law of partial pressures, the partial pressure is equal to the total pressure multiplied by the mole fraction of a component:
[tex]p_{H_2}=\chi_{H_2}p_2[/tex]
Knowing that:
[tex]p_2 = p_1\cdot \frac{n_2}{n_1}[/tex]
And:
[tex]\chi_{H_2}=\frac{n_H_2}{n_2}[/tex]
The equation becomes:
[tex]p_{H_2}=\chi_{H_2}p_2=p_1\cdot \frac{n_2}{n_1}\cdot \frac{n_H_2}{n_2}=p_1\cdot \frac{n_H_2}{n_1}[/tex]
Substituting the variables:
[tex]p_{H_2}=9 atm\cdot \frac{4 mol + 2 mol}{7 mol}=7.71 atm[/tex]
The volume, in liters, of 835 g SO3 at STP. Show your work.
Answer:
233.856 L
Explanation:
The STP conditions refer to the standard temperature and pressure. Pressure values at 1 atmosphere and temperature at 0 ° C are used and are reference values for gases. And in these conditions 1 mole of any gas occupies an approximate volume of 22.4 liters.
So first of all you should know the amount of moles that represents 835 g of SO₃. For that, you know that:
S: 32 g/moleO: 16 g/molSo: SO₃= 32 g/mol + 3*16 g/mol= 80 g/mol
Now a rule of three applies as follows: if 80 g of SO₃ are contained in 1 mol, 835 g of the compound, how many moles are there?
[tex]moles=\frac{835 g* 1 mole}{80 g}[/tex]
moles= 10.44
Finally, you apply a new rule of three as follows: if, according to STP, 1 mole occupies a volume of 22.4 L, 10.44 moles, how much volume does it occupy?
volume=[tex]\frac{10.44 moles*22.4 L}{1 mole}[/tex]
volume=233.856 L
The volume of 835 g SO₃ at STP is 233.856 L
To find the volume of 835 g of SO₃ at STP, determine the number of moles and then use the molar volume for gases at STP. The calculation yields approximately 234 liters, the mass, in grams, of a molecule of aspirin (C₉H₈O₄) as 2.99 × 10⁻²² g and the number of atoms in 5.78 mol NH₄NO₃ as 3.13 × 10²⁵ atoms.
a)The volume, in liters, of 835 g SO₃ at STP can be found by using the molar volume concept. At standard temperature and pressure (STP), one mole of any gas occupies 22.4 liters. Here’s the step-by-step solution:
First, we'll determine the number of moles of SO₃:The molar mass of SO₃ is calculated as follows:
S (Sulfur): 32.07 g/mol
O₃ (Oxygen): 3 × 16.00 g/mol = 48.00 g/mol
Total molar mass of SO₃ = 32.07 + 48.00 = 80.07 g/mol
Number of moles of SO₃ = Mass / Molar mass = 835 g / 80.07 g/mol ≈ 10.43 mol
Next, use the molar volume at STP to find the volume:Molar volume at STP = 22.4 L/mol
Volume of SO₃ = Number of moles × Molar volume = 10.43 mol × 22.4 L/mol ≈ 233.63 L
Round the answer to three significant figures: 233.63 L ≈ 234 Lb. Mass of a molecule of aspirin (C₉H₈O₄):
First, find the molar mass of aspirin:
Molar mass of C₉H₈O₄ = 9 × 12.01 (C) + 8 × 1.01 (H) + 4 × 16.00 (O)
Molar mass ≈ 180.17 g/mol
Next, use Avogadro's number (6.022 × 10²³ molecules/mol) to find the mass of one molecule:
Mass of one molecule = molar mass / Avogadro's number
= 180.17 g/mol / (6.022 × 10²³ molecules/mol)
≈ 2.99 × 10⁻²² g
c. Number of atoms in 5.78 mol NH₄NO₃
First, determine the number of molecules in 5.78 mol:
Number of molecules = 5.78 mol × 6.022 × 10²³ molecules/mol
≈ 3.48 × 10²⁴ molecules
Next, determine the total number of atoms in one molecule of
NH₄NO₃: 1 N + 4 H + 1 N + 3 O = 9 atoms
So, the total number of atoms is:
Total atoms = 3.48 × 10²⁴ molecules × 9 atoms/molecule
≈ 3.13 × 10²⁵ atoms
Therefore, the volume of 835 g SO₃ at STP is approximately 234 liters, the mass, in grams, of a molecule of aspirin (C₉H₈O₄) is 2.99 × 10⁻²² g and the number of atoms in 5.78 mol NH₄NO₃ is 3.13 × 10²⁵ atoms.
Complete question.
Find each of the following quantities:
a. the volume, in liters, of 835 g SO₃ at STP
b. the mass, in grams, of a molecule of aspirin (C₉H₈O₄)
c. the number of atoms in 5.78 mol NH₄NO₃
If the atmospheric pressure in the laboratory is 1.2 atm, how many moles of gas were in each syringe?
Air(H2O) syringe
Room temperature water at 21.3 degrees Celsius
Volume of 5.1 mL
Hydrogen(H2) syringe
Room temperature water at 21.3 degrees Celsius
Volume of 5.2 mL
Answer:
A: 2.525 x 10⁻⁴ mol
B: 2.583 x 10⁻⁴ mol
Explanation:
Part A:
Data Given:
Temperature of water (H₂O) = 21.3°CConvert Temperature to Kelvin
T = °C + 273
T = 21.3 + 273 = 294.3 K
volume of (H₂O) gaseous state = 5.1 mLConvert mL to liter
1000 mL = 1 L
5.1 ml = 5.1/1000 = 0.0051 L
Pressure = 1.2 atmno. of moles = ?Solution
no. of moles can be calculated by using ideal gas formula
PV = nRT
Rearrange the equation for no. of moles
n= PV / RT . . . . . . . . . (1)
where
P = pressure
V = Volume
T= Temperature
n = Number of moles
R = ideal gas constant
where
R = 0.08206 L.atm / mol. K
Now put the value in formula (1) to calculate no. of moles of
n = 1.2 atm x 0.0051 L / 0.08206 L.atm.mol⁻¹. K⁻¹ x 294.3 K
n = 0.0061 atm.L / 24.162 L.atm.mol⁻¹
n = 2.525 x 10⁻⁴ mol
no. of moles of gas (H₂O) = 2.525 x 10⁻⁴ mol
_______________
Part B:
Data Given:
Temperature of water (H₂) = 21.3°CConvert Temperature to Kelvin
T = °C + 273
T = 21.3 + 273 = 294.3 K
volume of (H₂) gas = 5.2 mLConvert mL to liter
1000 mL = 1 L
5.2 ml = 5.2/1000 = 0.0052 L
Pressure = 1.2 atmno. of moles = ?Solution
no. of moles can be calculated by using ideal gas formula
PV = nRT
Rearrange the equation for no. of moles
n= PV / RT . . . . . . . . . (1)
where
P = pressure
V = Volume
T= Temperature
n = Number of moles
R = ideal gas constant
where
R = 0.08206 L.atm / mol. K
Now put the value in formula (1) to calculate no. of moles of
n = 1.2 atm x 0.0052 L / 0.08206 L.atm.mol⁻¹. K⁻¹ x 294.3 K
n = 0.0062 atm.L / 24.162 L.atm.mol⁻¹
n = 2.583 x 10⁻⁴ mol
no. of moles of gas (H₂) = 2.583 x 10⁻⁴ mol
4. What do the numbers in Carbon-12 and Carbon-14 represent?!
Answer:
The number in C-12 and C-14 represent their atomic masses.
Explanation:
The number in C-12 and C-14 represent their atomic masses.
These two are the isotopes of carbon.
Isotopes of an element have same atomic number and different atomic masses due to different number of neutrons present.
An atom consist of electron, protons and neutrons. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus. All these three subatomic particles construct an atom.
All isotopes of carbon have same number of electrons and protons i.e, six
while C-14 has 8 neutrons and C-12 has six neutrons.
C-14 = 14-6 = 8
C-12 = 12-6 = 6
Thus sum of neutrons and protons is atomic mass that's why C-14 has 14 atomic mass (8+6=14) while C-12 has 12 atomic mass (6+6=12).
HELP ASAP!
Explain how meteorologists make weather predictions. Include at least two types of weather tools and how they help inform the predictions. Use complete sentences.
PLEASE HELP! This is science by the way.
1. Meteorologist predict the weather by using tools. They use these tools to measure atmospheric conditions that occurred in the past and present, and they apply this information to create educated guesses about the future weather. The best we can do is observe past and present atmospheric patterns and data, and apply this information to what we think will happen in the future. Meteorologists use the scientific method on a daily – and even hourly – basis!
2. They use thermometers, barometers, sling psychrometers and rain gauges. They also use anemometers, hygrometers, weather maps, weather balloons and weather satellites.
Final answer:
Meteorologists make weather predictions by using weather stations and radar to gather data and analyze patterns in the atmosphere.
Explanation:
Meteorologists make weather predictions by using various tools to gather data and analyze patterns in the atmosphere.
Two types of weather tools commonly used by meteorologists are:
Weather stations: These are equipped with instruments such as barometers to measure air pressure, thermometers to measure temperature, and anemometers to measure wind speed and direction.
Radar: Weather radar uses radio waves to detect precipitation and track its movement. This information is crucial for predicting the path and intensity of storms.
By collecting data from these tools and analyzing it, meteorologists can make accurate weather predictions.
50 POINTS - Calculate the molar mass for each compound, round off after 2 decimal points. PLEASE SHOW WORK Like this: H2O= 2H(1.00g)+10(15.99g)=17.99 g
1. HCl
2.NaOH
3.K2SO4
4.NO3
5.Ca(OH)2
Answer:
Explanation:
Molar mass:
Molar mass of substance is sum of atomic weight of all the atoms of elements present in it.
HCl
Atomic weight of hydrogen = 1.00 amu
Atomic weight of chlorine = 35.45 amu
Atomic weight of HCl = 1.00+35.45 = 36.45 g/mol
K₂SO4:
Atomic weight of potassium = 39.09× 2 = 78.18 amu
Atomic weight of sulfur = 32.07 amu
Atomic weight of oxygen = 15.99×4 = 63.96 amu
Atomic weight of K₂SO4 = 63.96+32.07+ 78.18 = 174.21 g/mol
Ca(OH)₂:
Atomic weight of calcium = 40.08 amu
Atomic weight of oxygen = 15.99 × 2 amu = 31.98 amu
Atomic weight of hydrogen = 1.00 × 2 = 2.00 amu
Atomic weight of Ca(OH)₂ = 74.06 g/mol
NaOH:
Atomic weight of sodium = 22.99 amu
Atomic weight of oxygen = 15.99 amu
Atomic weight of hydrogen = 1.00 amu
Atomic weight of NaOH = 39.98 g/mol
NO₃:
Atomic weight of nitrogen = 14.01 amu
Atomic weight of oxygen = 15.99×3 = 47.97 amu
Atomic weight of NO₃ = 61.98 g/mol
Which atom or ion is the largest?
Answer:
The elements with the largest atomic radii are located towards the left and bottom of the periodic table (i.e. at the bottom of Group 1). Thus, in theory, the largest atom should be Francium.
it is Francium
Explanation:
What happens when molten material is heated from Earth’s core?
A It sinks towards the core.
B It rises up towards the crust.
C Lava travels away from the core and forms the crust.
D Lava travels away from the crust and forms the mantle
Answer:
B
Explanation:
I took the test
-Leyla-
wishing you success
why does the second row of the periodic table not have a d block section
Second row of periodic table can have maximum of eight electrons which are occupied within s and p block section by occupying 2 and 6 electrons respectively and thus becoming stable thus it doesn't have d block section.
What is periodic table?Periodic table is a tabular arrangement of elements in the form of a table. In the periodic table, elements are arranged according to the modern periodic law which states that the properties of elements are a periodic function of their atomic numbers.
It is called as periodic because properties repeat after regular intervals of atomic numbers . It is a tabular arrangement consisting of seven horizontal rows called periods and eighteen vertical columns called groups.
Elements present in the same group have same number of valence electrons and hence have similar properties while elements present in the same period show gradual variation in properties due to addition of one electron for each successive element in a period.
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How many moles are 5.42 x 1026 atoms of calcium?
Answer: 900.33moles
Explanation:Please see attachment for explanation
Answer:
There are 899.88 moles.
Explanation:
To solve this problem we'll need to use Avogadro's number, which tells us that in one mole of a species, there are 6.023x10²³ atoms (or molecules).
With the above information in mind we can calculate the moles in 5.42x10²⁶ atoms of calcium:
5.42x10²⁶ atoms * [tex]\frac{1 mol}{6.023x10^{23}atoms}[/tex] = 899.88 molesWater has a boiling point of 100.0°C and a Kb of 0.512°C/m. What is the boiling
point of a 8.5 m solution of Mg3(PO4)2 in water?
Answer:
104.352°C
Explanation:
Data Given:
Boiling point of water = 100.0°C
Kb (boiling point constant = 0.512°C/m
Concentration of the Mg₃(PO₄)₂ = 8.5 m
Solution:
Formula Used to find out boiling point
ΔTb = m.Kb . . . . . . (1)
where
ΔTb = boiling point of solution - boiling point of water
So,
we can write equation 1 as under
ΔTb = Tb (Solution) -Tb (water)
As we have to find out boiling point so rearrange the above equation
Tb (Solution) = m.Kb + Tb (water) . . . . . . . (2)
Put values in Equation 2
Tb (Solution) = (8.5 m x 0.512°C/m ) + 100.0°C
Tb (Solution) = 4.352 + 100.0°C
Tb (Solution) = 104.352°C
so the boiling point of Mg₃(PO₄)₂ 8.5 m solution = 104.352°C
Which noble gas does not have a true octet
Answer:
Hellium
Explanation:
Data Given:
Krypton
Helium
Xenon
Neon
doesn't have true Octet =?
Solution:
Octet Rule:
The atoms have 8 electrons in their valence shell and have stable electronic configuration.
Now we will look for the electronic configuration of each given noble gas to look for octet rule
1. Krypton (Kr)
Atomic No. 36
Electrons per shell: 2, 8, 18, 8
Electronic configuration: [Ar] 3d¹⁰, 4s², 4p⁶
So
it have 8 electrons in its outer (valance) shell and obey octet rule
___________________
2. Hellium (He)
Atomic No. 2
Electrons per shell: 2
Electronic configuration: 1s²
So
It have 2 electrons in its outer (valance) shell and do not obey octet rule. although it is stable and obey duplet rule but not have true octet.
_____________________
3. Xenon (Xe)
Atomic No. 54
Electrons per shell: 2, 8, 18, 18, 8
Electronic configuration: [Kr] 4d¹⁰, 5s², 5p⁶
So
it have 8 electrons in its outer (valance) shell and obey octet rule
___________________
4. Neon (Ne)
Atomic No. 10
Electrons per shell: 2, 8
Electronic configuration: 1s², 2s², 2p⁶
So
it have 8 electrons in its outer (valance) shell and obey octet rule
___________________
So its only the hellium that do not have octet.
what are the pros and cons of reclamation?
Answer:
Advantages: More land has been made available for development. More buildings and infrastructure can be built, and also for other reasons.
Disadvantages: Much greenery has been removed in order for the land needed. Land reclamation can be damaging to corals and marine life. Corals are usually moved to another place when land is to be reclaimed. The corals might not be able to survive in that certain habitat, and thus die out. In some countries, where the project is large-scale, they do not even bother to re-plant the corals elsewhere, instead just reclaim the land on their habitat, causing them to die out immediately. Marine life, such as fishes, might not have enough food after the underwater plantations are destroyed due to reclamation of land. This applies to the food chain. The waters might also be polluted from the soil used to reclaim land, causing the fishes to die and blocking out sunlight, depriving the underwater plants of growth. Marine habitats are also destroyed, as mentioned earlier; therefore, the marine creatures would be forced to move to another new habitat. Some might not be able to adapt, and thus die out. Some would just die without even finding a new habitat, as they cannot move long distances in water. Of course, the reasons and examples look tempting to us humans, but marine life is life too! We should try to protect is as much as possible, instead of just focusing on the advantages.
at 40°c, 50g of KClO3 is dissolved in 100g of water, is this solution saturated, unsaturated, or supersaturated?
Answer:
Supersaturated
Explanation:
Let's define the types of solutions in the context of this problem firstly:
An unsaturated solution is a solution in which addition of more solute would result in dissolution at a given specific temperature. That is, at [tex]40^oC[/tex], if we add more than 50 g of [tex]KClO_3[/tex] and it still dissolves in 100 g of water, then we have an unsaturated solution.A saturated solution is a solution in which we have a maximum amount of a solute that could possibly dissolve in a solvent at a given specific temperature. That is, at [tex]40^oC[/tex], if we add 50 g of [tex]KClO_3[/tex] and no more of it dissolves, then we have a saturated solution.A supersaturated solution is a solution in which we have a greater amount of solute dissolved than we could possibly dissolve under normal circumstances. Let's say that the solubility here is 50 g of [tex]KClO_3[/tex] in 100 g of water at [tex]40^oC[/tex]. If we dissolve more than 50 g, then we have a supersaturated solution.We need to use a solubility curve for salts given below. Notice that the intersection in the y-axis at [tex]40^oC[/tex] is at about 14 g. This means a saturated solution would be obtained if 14 g of [tex]KClO_3[/tex] were dissolved in 100 g of water at this temperature. Anything above it would yield a supersaturated solution, below – an unsaturated solution.
Hence, we have a supersaturated solution.
how many moles would 73.8L of a gas be at STP
Answer: 3.295moles
Explanation:Please see attachment for explanation
How many carbon atoms are there in the empirical formula corresponding to C10H22O2?
Final answer:
To find the number of carbon atoms in the empirical formula for C10H22O2, divide each element's subscript by the greatest common divisor, which is 2. The resulting empirical formula is C5H11O, which means there are 5 carbon atoms.
Explanation:
To determine how many carbon atoms are there in the empirical formula corresponding to C10H22O2, you first need to find the simplest whole-number ratio of carbon (C) to hydrogen (H) to oxygen (O) atoms. The molecular formula C10H22O2 shows that the compound has 10 C atoms, 22 H atoms, and 2 O atoms. However, this is not the simplest whole-number ratio. We can divide each of the subscripts by the greatest common divisor, which in this case is 2, to find the empirical formula. So the empirical formula is C5H11O, meaning that the smallest ratio of elements in the compound is 5 carbon atoms to 11 hydrogen atoms to 1 oxygen atom.
Final answer:
The empirical formula for the compound C10H22O2 is achieved by simplifying to the simplest whole-number ratio, resulting in the formula C5H11O, which indicates there are 5 carbon atoms in the empirical formula.
Explanation:
To find out how many carbon atoms there are in the empirical formula for the compound with the molecular formula C10H22O2, we need to simplify the formula by dividing by the greatest common divisor of the subscripts of each element. The goal is to achieve the simplest whole-number ratio of the atoms in the compound.
The numbers of atoms of each element in the molecular formula are in the ratio 10:22:2 for carbon, hydrogen, and oxygen respectively. By simplifying, we find that this ratio can be divided by 2, which gives us 5:11:1. Therefore, the smallest whole-number ratio, which provides us with the empirical formula, is C5H11O. Hence, there are 5 carbon atoms in the empirical formula.
A contains 2.60g of impure h2so4 in 5oocm³ of a solution 5.30g of na2co3 in 1.00dm³ of solution
An average of 27.65cm of a neutralized completely 25.0cm of b
Calculate the
A)concentration of b in moldm³
B)concentration of a in 1)moldm³ 2)g/dm³
C)%purity of h²so4
Answer: a. 0.05mol/dm3
bi. 0.045mol/dm3
bii. 4.41g/dm3
c. 84.8%
Explanation:Please see attachment for explanation
Suppose we have the following pizza recipe:
1 crust + 5 ounces tomato sauce + 2 cups cheese → 1 pizza
Let's assume that we currently have 4 crusts and 10 cups of cheese. What is the minimum number of ounces of tomato sauce would you need in order to make 3 pizzas?
Answer:
we required 15 ounce tomato sauce for 3 pizza
Explanation:
Given data:
Crust = 4
Cheese = 10 cups
number of ounces of tomato sauce for 3 pizza = ?
Solution:
Recipe and ingredients for one pizza:
1 crust + 5 ounce tomato sauce + 2 cups cheese → 1 pizza
Ingredients required for 3 pizza;
1 × 3 crust + 5 ×3 ounce tomato sauce + 2×3 cups cheese → 3 pizaa
3 crust + 15 ounce tomato sauce + 6 cups cheese → 3 pizaa
So we required 15 ounce tomato sauce for 3 pizza.
15 ounce tomato sauce for 3 pizzas.
Given:-
Crust = 4
Cheese = 10 cups
number of ounces of tomato sauce for 3 pizza = ?
Recipe and ingredients for one pizza:1 crust + 5 ounce tomato sauce + 2 cups cheese → 1 pizza
Ingredients required for 3 pizza;[tex]1 \times 3 crust + 5 \times3 ounce tomato sauce + 2\times3 cups cheese\rightarrow 3 pizaa[/tex]
[tex]3 crust + 15 ounce tomato sauce + 6 cups cheese\rightarrow3 pizaa[/tex]
So we required 15 ounce tomato sauce for 3 pizza.
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brainly.com/question/25788590
Which nuclear process does the model illustrate
Nuclear fission
Hope I helped :)
The model illustrates the nuclear process of fission, where a larger nucleus splits into two or more smaller nuclei along with the release of energy.
Nuclear fission is the process illustrated, where a neutron causes a fissile atom like U-235 to split into smaller nuclei, releasing energy and more neutrons. During fission, the nucleus undergoes division, resulting in the production of additional particles and the liberation of energy.
The nuclear process illustrated by the model is nuclear fission. In nuclear fission, a neutron collides with a fissile atom like U-235, creating a heavier unstable isotope, in this case, U-236. This unstable nucleus then undergoes fission, splitting into smaller nuclei and releasing additional neutrons along with a significant amount of energy.
The liquid drop model proposed by Niels Bohr and John Wheeler explains this by comparing the nucleus to a droplet of water. When an external neutron impacts the uranium nucleus, it causes the nucleus to deform and eventually split, similar to a vibrating water droplet eventually breaking apart. The process can be tracked using nuclear symbols, and understanding it is crucial for applications like nuclear reactors where controlled fission is used for electricity generation.
Moreover, the models constructed to describe the nucleus should accurately reflect known nuclear properties and predict new properties that experiments might reveal. These predictions help in understanding nuclear processes such as fission in greater detail.
PLEASE HELP
Your kidneys, the main organ of the excretory system, work with the __________ system, to filter liquid waste from your blood.
A) circulatory
B) digestive
C) immune
D) nervous
Answer:
The correct answer is A) circulatory
Explanation:
The circulatory system collects metabolic wastes from the blood, which will be eliminated by the kidneys through urine.
The kidneys are responsible for the elimination of waste, acids and excess fluid from the body, maintaining the balance of water, salts and minerals. Blood flows into the kidney through the renal artery.
Conductors have(blank)
resistance.
Moderate.
Very High.
Very low.
Answer:
The correct option is C) Very low
Explanation:
In physics, resistance can be described as the opposition to the flow of current or the flow of electrons. Conductors are known to be materials which can conduct electricity. Hence, conductivity and resistance are opposite to each other. Good conductors will have very little or no resistance and will have enhanced conductivity. On the contrary, insulators are materials which will have more resistance and they cannot conduct electricity as efficiently.
Answer:
low
Explanation:
Solid iodine crystals at the bottom of a closed test tube sublime to form iodine vapor. The vapor eventually fills the entire test tube. Use kinetic molecular theory to explain the diffusion of the iodine gas and whether diffusion happens in liquids and solids.
Answer:
Diffusion occurs in solid and liquid through the constant and random motion of the smaller particles called molecules of either solid, liquid or gaseous in permeable medium as witnessed in the experiment.
Explanation:
The kinectic molecular theory of matter states that the smaller particles of matters called molecules are in constant, but random motion and the degree of movement of the molecules depends on the state or phase such matter exist, which is a derivative of the total kinetic energy possessed by the molecules. This average kinetic energy of the molecules as iodine for example is proportional to the temperature of the matter.
Diffusion should be remembered as the movement of molecules of matters from a highly concentrated region otherwise called hypertonic region to a less concentrated region called hypotonic region through a permeable medium until there is an equilibrium in the system. Since diffusion is expected to involve the movement of molecules, and any matter that can exhibit diffusion is said to have moving molecules, therefore, the kinetic molecular theory of matter is proven to be accurate with the observed movement of iodine molecules in the test tube. This shows that even the molecules of solid matters are in constant random motion, this is made more convincing when these molecules migrate without the addition of external energy source like heat, which then help to understand that the natural iodine molecules are in constant random motion, as they are changed to gaseous state without passing through liquid state, a phenomenon called sublimation.