Answer:
the first is 5
the second is 3
The third is 5
the last one is 4:)
Explanation:
Ammonia (NH3(g), AH = -46.19 kJ/mol) reacts with hydrogen chloride (HCl(g), AH = -92.30 kJ/mol) to
form ammonium chloride (NH4Cl(s), AH = -314.4 kJ/mol) according to this equation:
NH3(g) + HCl(9) ► NH4Cl(s)
What is AHxn for this reaction?
The enthalpy of a reaction can be predicted from the enthalpy of reactants and products. The enthalpy of the reaction is - 175.9 kJ/mol.
What is reaction enthalpy ?The enthalpy of a reaction is the heat energy released or absorbed by the reaction system. For heat absorption, enthalpy is positive and for evolution, enthalpy is negative.
Th enthalpy of reaction = enthalpy of products - enthalpy of reaction.
Given enthalpy of reactants
ΔH (NH₃) = -46.19 kj/mol
ΔH(HCl) = - 92.30 kj/mol
ΔH(NH₄Cl) = -314.4 kj/mol
Reaction enthalpy = -314.4 kj/mol - (-46.19 kj/mol +- 92.30 kj/mol ) =- 175.9 kJ/mol.
Therefore, the reaction enthalpy is - 175.9 kJ/mol..
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Consider the following balanced reaction:
4NH3 (g) + 502 (g) – 4NO (g) + 6H20 (g)
How many grams of ammonia are required to react completely with 40 g of oxygen?
A. 154
B.
179
C. 34 g
D.
19 g
Answer:
17g
Explanation:
4NH3 (g) + 502 (g) –> 4NO (g) + 6H20 (g)
Mass of O2 mole = 32g
Therefore 5O2 = 160g
Mass of NH3 mole = 17g
Therefore 4NH3 = 17 x 4 =68g
Required amount of NH3 = 68 x 40/160 = 17g
How big is the solar system compared to universe
Answer:
You are one of the billions of people on our Earth. Our Earth orbits the Sun in our Solar System. Our Sun is one star among the billions in the Milky Way Galaxy. Our Milky Way Galaxy is one among the billions of galaxies in our Universe.
Explanation:
Hi!The solar system has a diameter more than 40 times greater than the distance to the sun, but the solar system is a tiny part of much larger galaxy. Our galaxy (Milky Way) is only one of billions of other galaxies in the universe.
For the following equation; ____S8 + ___ O2 à ___ SO2 a. State what type of reaction is taking place? b. Balance the equation c. If we started with 4.0 grams of Sulfur, how many moles of Sulfur Dioxide would be produced? (You must show your work)
Answer:
a) Combustion
b) S8 + 8O2 -> 8SO2
c) 0.125 mol SO2
Explanation:
a) Combustion
b) S8 + 8O2 -> 8SO2
c)
[tex]4.0 g S8 (\frac{1 mol S8}{256 g S8})(\frac{8 mol SO2}{1 mol S8} ) =0.125 mol SO2[/tex]
Ammonia, NH3, is produced by the reaction N2 (g) + 3H2 (g) → 2NH3 (g). if 3.50 mol of nitrogen is present, what volume of NH3 at 25.0°C and 1.15atm of pressure can be made?
a
0.312 L
b
74.5 L
c
157 L
d
149 L
Answer:
Option D. 149L
Explanation:
Step 1:
The balanced equation for the reaction. This is given below:
N2 (g) + 3H2 (g) → 2NH3 (g)
Step 2:
Determination of the number of mole of NH3 produced by the reaction of 3.50 mole of N2. This is illustrated below:
From the balanced equation above,
1 mole of N2 reacted to produce 2 moles of NH3.
Therefore, 3.5 moles of N2 will react to produce = 3.5 x 2 = 7 moles of NH3.
Therefore, 7moles NH3 is produced.
Step 3:
Determination of the volume of NH3 produced from the reaction. This can be achieved as shown below:
Data obtained from the question include:
Temperature (T) = 25.0°C = 25.0°C + 273 = 298K
Pressure (P) = 1.15 atm
Number of mole (n) = 7 moles
Gas constant (R) = 0.082atm.L/Kmol
Volume (V) =..?
Applying the ideal gas equation to obtain the volume:
PV = nRT
Divide both side by P
V = nRT /P
V = (7 x 0.082 x 298)/1.15
V = 149 L
Therefore, the volume of NH3 produced from the reaction is 149L
During an epic round of Tug-of-War, Jared and James thought they’d be able to beat Mr. Collins no problem. Together, they applied a force of 300 N pulling to the left. But with one arm on the rope and the other at his side, Mr. Collins applied a 300 N force to the right. What is the net force and direction on the rope?
The net force on the rope is equal to zero as both forces are in equal magnitude but in opposite directions.
What is the net force?The net force on an object can be defined as the vector sum of all forces acting on a particle or object. The net force can be described as a single force representing same the effect of the actual forces on the motion of a particle. Net force offers the same value of acceleration as all those actual forces together.
The net force has a similar effect on the rotational motion as all actual forces taken together so it becomes the resultant force. It.
In the given problem, the applied force by Jared and James is in the opposite direction of the force applied by Mr. Collins.
Given, the force applied by James and Jared in the left direction= 300N
The force applied by Mr. Collins in the right direction = -300N
The net force on the rope = 300N + (-300N) = 0
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HELP MEEEE ASAP!!! Answer these questions based on what you learned from the passage. You can assume any body structure comes from a human.
The flagella are like .
The pilli are like .
The capsule is like .
The cell wall is like the .
The ribosomes are like .
The nucleoid is like the .
The cell membrane is like .
The cytoplasm is like happens.
Answer:
1.Legs
2.Arms and hands
3.Armor
4.Skeletal
5.Carpenters
6.Brain
7.Skin
8.Blood
Explanation:
You can google dem and it will show you all the answers
Answer:
legs
arms and hands
skeletal system
carpenter
brain
skin
blood
Explanation:
Which is the correct net ionic equation for the following reaction: 2 HBr (aq) + Co(OH)2 (aq) Imported Asset CoBr2 (aq) + 2 H2O (l)?
A. H+ (aq) + OH− (aq) Imported Asset H2O (l)
B. Co(OH)2 (aq) Imported Asset Co+2 (aq) + OH− (aq)
C. 2 H+ (aq) + Co(OH)2 (aq) Imported Asset Co+2 (aq) + 2 H2O (l)
D. 2 HBr (aq) + Co(OH)2 (aq) Imported Asset CoBr2 (aq) + 2 H2O (l)
its B why because the reaction is good with B
Consider a sample of 11.2 g of ice initially at 0.0 C. How much energy in kilojoules is required to melt the ice and warm it to 22.0 C?
The molecular weight of water is 18.015 g/mol.
PLEASE HELP lol
Answer:
1034.88J
Explanation:
Given that:
mass (m) = 11.2 g, initial temperature = 0°C, final temperature = 22°C, the specific heat capacity of water (C) = 4.2 J/g°C
Temperature difference (ΔT) = final temperature - initial temperature = 22 - 0 = 22°C
The quantity of heat (Q) required to melt the ice can be calculated from the equation:
Q = mCΔT
Q = 11.2 g × 4.2 J/g°C × 22°C
Q = 1034.88J
Can any one help on this one
Choose all the answers that apply.
Erosion can be reduced by:
removing topsoil
contour plowing
planting trees
putting up fences
Answer:
removing topsoil, and putting up fencing
Explanation:
hopefully this is correct :)
Study the following picture. Which of the following statements is not a fact? The bins contain four different types of balls. Balls are used in various competitive sports. All balls are made from leather. According to the data (the picture in this case), the main color of a basketball is orange and the main color of a soccer ball is white.
Answer:
The one that isnt a fact is that all balls are made of leather.
Good luck! Hope this helped!
:)
Explanation:
5. A 4.44 L container holds 0.481 mol of O2 at 22.6°C. What is the pressure of the tank?
(Show work and u
Answer: The pressure of the tank will be 2.63 atm
Explanation:
According to ideal gas equation:
[tex]PV=nRT[/tex]
P = pressure of gas = ?
V = Volume of gas = 4.44 L
n = number of moles = 0.481
R = gas constant =[tex]0.0821Latm/Kmol[/tex]
T =temperature =[tex]22.6^0C=(22.6+273)K=295.6K[/tex]
[tex]P=\frac{nRT}{V}[/tex]
[tex]P=\frac{0.481mol\times 0.0821Latm/K mol\times 295.6K}{4.44L}=2.63atm[/tex]
The pressure of the tank will be 2.63 atm
Answer: The pressure of given tank is 2.63 K.
Explanation:
The given data is as follows.
V = 4.44 L, n (no. of moles) = 0.481 mol,
T = [tex]22.6^{o}C[/tex] = (22.6 + 273) K = 295.6 K
R (ideal gas constant) = 0.0821 atm L/mol K
Now, using the ideal gas equation we will calculate the pressure of the given tank as follows.
PV = nRT
[tex]P \times 4.44 L = 0.481 mol \times 0.0821 atm L/mol K \times 295.6 K[/tex]
P = 2.63 atm
Therefore, we can conclude that the pressure of given tank is 2.63 K.
Why is it that some people get a static shock when they walk across the carpet and touch a metal surface?
Answer:
This happens because there was an electric charge.
What effect do tube dwelling worms have on mudflat ecosystems?
Tube-dwelling worms contribute to the health of mudflat ecosystems by aerating the sediment and recycling nutrients, which supports diverse life and adds to the complexity of the food web. They provide essential services that help maintain ecosystem balance.
Explanation:Tube-dwelling worms play a significant role in mudflat ecosystems. By burrowing into the sediment, the worms aerate the mud, which facilitates the penetration of oxygen and helps recycle nutrients. This process can enhance the productivity of the mudflat by supporting a diverse range of organisms. Tube-dwelling worms, like those around hydrothermal vents, form symbiotic relationships with bacteria. Although the worms you asked about are not the same as those at hydrothermal vents, the principle of symbiosis might still hold in their interactions with other organisms in the mudflat. The tube worms contribute to the complexity of the food web as they become prey for higher-order predator vertebrates. Therefore, their presence and activities are integral to maintaining the structural and functional integrity of the muddy environment they inhabit.
56.5 g of sodium nitrate is dissolved in water to make 627 g of solution . what is the percent sodium nitrate in the solution
Answer:
9.01%
Explanation:
The following data were obtained from the question:
Mass of sodium nitrate, NaNO3 = 56.5g
Mass of solution = 627g
The percentage composition of sodium nitrate, NaNO3 in the solution can be obtained as follow:
Percentage composition of NaNO3 = Mass of NaNO3/mass of solution x 100
Percentage composition of NaNO3 = 56.5/627 x 100 = 9.01%
Therefore, the percentage composition of sodium nitrate, NaNO3 in the solution is 9.01%
Answer:
The percentage of sodium nitrate in the solution is 9.01%
Explanation:
Here we have;
56.5 g of sodium nitrate dissolved in water to make a solution of mass = 627 kg
Mass of sodium nitrate, NaNO₃, in the solution = 56.5 g
Mass of resultant solution = 627 g
The relation for the percentage of a solute by mass dissolved in a solvent is presented as follows;
[tex]Percentage \, by \, mass = \frac{Mass \, of \, solute}{Mass \, of \, solution} \times 100[/tex]
Therefor, for the 56.5 g of sodium nitrate solution, we have;
[tex]Percentage \, by \, mass \, of \, NaNO_3 = \frac{Mass \, of \, NaNO_3}{Mass \, of \, solution} \times 100 = \frac{56.5 \, g}{627 \, g} \times 100 = 9.01 \%[/tex]
What is the percent by mass of a solution that
contains 25 g KNO3 in 400.0 g H20?
Answer: 5.9%
Explanation: e2020
Answer:
c) 5.9%
Explanation:
got it correct on edg
1. What happens to a wave if it experiences reflection?
100 POINTS-
Which organelle could best be compared to a closet in a house?
A. chloroplast
B. mitochondrion
C. nucleus
D. vacuole
Answer:
Im no scientist but I think its D. vacuole
Explanation:
Which is a characteristic of a weak electrolyte?
It does not dissociate or ionize in water.
It partially dissociates or ionizes in water.
It does not conduct electricity.
It easily conducts electricity.
O
Answer:
A weak electrolyte is an electrolyte that does not completely dissociate in aqueous solution. The solution will contain both ions and molecules of the electrolyte. Weak electrolytes only partially ionize in water (usually 1% to 10%), while strong electrolytes completely ionize (100%).
Explanation:
The weak electrolyte are characterized to be partially dissociates or ionizable in water. Hence, option B is correct.
What is an electrolyte?Electrolyte can be given as the chemical compound present in the form of liquid or gel with the ability to dissociate into the constituent ion on the dissolution or the application of electricity.
The ability of the electrolyte to be dissociated into the constituent ions differentiate them as strong and weak electrolytes. The electrolytes that can be easily dissociated into the constituent ions are termed as strong electrolytes.
The compounds that found not to be completely ionized into the constituent ions on dissolution in water are termed as weak electrolytes. These are partially ionizable. Thus, option B is correct.
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What are the genotypes of the parents?
The Punnett square shows the possible genotype
combinations for the offspring of two parents.
O Gg and Gg
O GG and GG
Ogg and gg
O Gg and gg
GG
Gg
gg
Answer:
Gg and Gg
Explanation:
Select all the correct answers.
What are some applications of fission reactions?
as a zero-waste energy source
for generating large amounts of heat
for creating stable elements from unstable ones
for creating new, heavier elements
n
as the energy source in nuclear weapons
Reset
Next
Some applications of fission reactions are for generating large amounts of heat and as the energy source in nuclear weapons.
What is a fission reaction?Nuclear fission is a reaction in which the nucleus of an atom splits into two or more smaller nuclei.
Nuclear fission can be useful in terms of generating large amounts of heat that can be used to produce nuclear power and as the energy source in nuclear weapons.
Thus, some applications of fission reactions are for generating large amounts of heat and as the energy source in nuclear weapons.
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Answer:
B, C, E
Explanation:
What is the world's most common acid
and also the world's most common base?
Answer:
Thus, as both an amphoteric compound and the most common liquid on Earth, it follows that water is both the most common acid as well as the most common base on planet Earth
The most common acid in the world is sulfuric acid (H2SO4), and the most common base is sodium hydroxide (NaOH).
Explanation:Acids and bases are common substances found in many everyday items. The most common acid in the world is sulfuric acid (H2SO4). It is used in various industrial processes and has a wide range of applications.
The most common base in the world is sodium hydroxide (NaOH). It is commonly known as caustic soda and is used in many household products such as detergents and drain cleaners.
Which equation correctly shows how you could
calculate [OH-] from [H*]?
[OH-1 -1.010-14
[H*]
[H+1 -1.0 x 10-14
[OH-]
The correct equation to calculate [OH-] from [H+] is [OH-] = Kw / [H+], with Kw being 1.0 × 10^-14 at 25°C.
Explanation:The correct equation to calculate [OH-] from [H+] is Kw = [H+][OH-], where Kw is the ion-product constant for water (1.0 × 10-14 at 25°C). You can rearrange this equation to solve for [OH-] if [H+] is known: [OH-] = Kw / [H+]. For example, if a solution has a hydronium ion concentration [H3O+] of 1.0 × 10-1M, the hydroxide ion concentration [OH-] can be calculated as follows: [OH-] = 1.0 × 10-14 / 1.0 × 10-1 = 1.0 × 10-13M.
Sometimes engineers increase output through crossbreeding. This is when
they:
A. combine two plants so that each plant's strength compensates for
the other's weakness.
B: genetically alter the DNA of a plant to produce a desired trait.
C. cultivate a variety of plants in one area so that cross
contamination does not occur.
D. cultivate a variety of plants in one area so that one pest does not
destroy all the crops.
Crossbreeding in agriculture involves combining two plants to create a new variety with improved traits by using traditional breeding techniques or modern genetic engineering to produce GMOs.So the correcct option is A.
Explanation:When engineers increase output through crossbreeding, they are combining two plants so that each plant's strengths compensate for the other's weaknesses. This is a method that has been employed to develop new crop varieties with desirable traits such as disease resistance, better nutritional value, and improved shelf-life. Crossbreeding can involve traditional breeding techniques with closely related species or could be done through modern biotechnology practices - creating genetically modified organisms (GMOs), where specific genes are introduced to give the crop beneficial traits like herbicide resistance, better taste, or drought tolerance.
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How does the molecular property of water affect its cohesive properties?
economics 
At which point would the government be most likely to try to stimulate the economy?124
At which point would a business be most likely to hire new workers?
Answer:
4 & 5
Explanation:
Answer:
4
5
Explanation:
got it right on edg 2021
A balloon filled with helium has a volume of 30.0 L and a temperature of 15.0 C. What will the volume of the balloon be if the temperature is increased to 80.0 C and the pressure remains constant?
Answer: 36.8 L
hope this helps
how many carbon atoms are present in a 2.5 carat diamond
The number of carbon atoms present in a 2.5 carat diamond is approximately 2.5 x 10^22, determined by first converting the weight of the diamond to grams, then to moles utilizing the molecular weight of carbon, and finally to atoms using Avogadro’s number.
Explanation:To determine the number of carbon atoms present in a 2.5 carat diamond, we need essential information about carbon and the diamond. The molecular weight of carbon (C) is 12.01 g/mol. We also know that a carat is 200 milligrams (mg) or 0.2 grams (g).
So, a 2.5-carat diamond weighs 0.2 g * 2.5 = 0.5g. We convert the mass of the diamond into moles using the molecular weight of carbon: 0.5 g / 12.01 g/mol = 0.0416 moles.
Then, knowing that one mole of any substance contains Avogadro's number of entities (approximately 6.022 * 10^23), we multiply the number of moles by Avogadro’s number: 0.0416 moles * 6.022 * 10^23 atoms/mole = 2.5 * 10^22 carbon atoms.
So, a 2.5 carat diamond contains about 2.5 * 10^22 carbon atoms.
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When white light is refracted through an object, you see many different colors because ________. (2 points)
Group of answer choices
the light bends enough to separate the colors
the object absorbs the colors and reflects them
the object causes the light to change directions
the white light travels in a straight line
Answer:
the object causes the light to change direction & the light bends enough to seperate the colors
also, tell me if i'm wrong