The Haber process can be used to produce ammonia (NH3) from hydrogen gas (H2) and nitrogen gas (N2). The balanced equation for this process is shown below. 3H2 N2 Right arrow. 2NH3 The molar mass of NH3 is 17. 03 g/mol. The molar mass of H2 is 2. 0158 g/mol. In a particular reaction, 0. 575 g of NH3 forms. What is the mass, in grams, of H2 that must have reacted, to the correct number of significant figures? 0. 1 0. 102 0. 10209 0. 1021.

Answers

Answer 1

Answer:

B

Explanation:

We are given that ammonia can be produced from hydrogen gas and nitrogen gas according to the equation:

[tex]\displaystyle 3\text{H$_2$} + \text{N$_2$} \longrightarrow 2\text{NH$_3$}[/tex]

We want to determine the mass of hydrogen gas that must have reacted if 0.575 g of NH₃ was produced.

To do so, we can convert from grams of NH₃ to moles of NH₃, moles of NH₃ to moles of H₂, and moles of H₂ to grams of H₂.

We are given that the molar masses of NH₃ and H₂ are 17.03 g/mol and 2.0158 g/mol, respectively.

From the equation, we can see that two moles of NH₃ is produced from every three moles of H₂.

With the initial value, perform dimensional analysis:

[tex]\displaystyle \begin{aligned} 0.575\text{ g NH$_3$}& \cdot \frac{1\text{ mol NH$_3$}}{17.03\text{ g NH$_3$}} \cdot\frac{3\text{ mol H$_2$}}{2\text{ mol NH$_3$}} \cdot \frac{2.0158\text{ g H$_2$}}{1\text{ mol H$_2$}} \\ \\ & = 0.102\text{ g H$_2$}\end{aligned}[/tex]

*Assuming 100% efficiency.

Our final answer should have three significant figures. (The first term has three, the second term has four (the one is exact), the third term is exact, and the fourth term has five. Hence, the product should have only three.)

In conclusion, our answer is B.


Related Questions


a 7.221 g sample of a compound contains 1.990 g carbon, 2.341 g hydrogen, and the rest is oxygen. Determine the
percent composition of the compound

Answers

Answer:

17.19%

Explanation:

mass of oxygen = 7.221 - (1.990 + 2.341)

= 2.890g

Empirical formula of the compound

For carbon,

1.990/12 = 0.1658

For hydrogen,

2.341/1 = 2.341

For oxygen,

2.890/16 = 0.1806

0.1658 ÷ 0.1658 = 1

2.341 ÷ 0.1658 = 14.11

0.1806 ÷ 0.1658 = 1.089

Empirical formula of the compound= CH14O

Molar mass= (1×12) + (14×1) + (1×16)

= 12+14+16

= 42g/mol

percentage composition= 7.221/42 × 100

= 17.19%

Consider the reaction below. H2PO4â€"" H2O Right arrow. H3O HPO42â€"" Which of the following is a baseâ€""conjugate acid pair? H2O and H3O H2O and H2PO4â€"" H2PO4â€"" and HPO42â€"" H2PO4â€"" and H3O.

Answers

Taking into account the Brønsted-Lowry acid-base theory, a base/conjugate acid pair is H₂O/H₃O⁺.

The Brønsted-Lowry acid-base theory (or the Brønsted-Lowry theory) identifies acids and bases based on whether the species accepts or donates protons or H⁺.

According to this theory, acids are proton donors while bases are proton acceptors. That is, an acid is a species that donates an H⁺ proton while a base is a chemical species that accepts an H⁺ proton from the acid.

So, reactions between acids and bases are H⁺ proton transfer reactions, causing the acid to form its conjugate base and the base to form its conjugated acid by exchanging a proton.

In other words, a conjugate base is an ion or molecule resulting from the acid that loses the proton, while a conjugate acid is an ion or molecule resulting from the base that gains the proton:

acid + base ⇄ conjugate base + conjugate acid

In this case, you know:

H₂PO₄ + H₂O → H₃O⁺ + HPO₄⁻

H₂PO₄ behaves like acid because donates an H⁺ proton while H₂O behaves like base because accepts an H⁺ proton from the acid.

So, H₃O⁺ is the conjugate acid of the H₂O and HPO₄⁻ is conjugate base of H₂PO₄.

In summary,  a base/conjugate acid pair is H₂O/H₃O⁺.

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what is mass of sodium hydroxide NaOH is present in 0.25 mole of sodium hydroxide
pls be quick​

Answers

Finding molar mass of NaOH

We know that

Molar mass of Sodium (Na) = 23 g/mol

Molar mass of Oxygen (O) = 32 g/mol

Molar mass of Hydrogen (H) = 2 g/mol

So,

Mass of 1 mole of NaOH

=> 1 × 23 + 1 × 16 + 1 × 1

=> 23 + 16 + 1

=> 40 g/mol

Now,

Mass = 40 × 0.25

Mass = 10 g

PLEASE HELP

When an electron in a hydrogen atom drops from the fifth energy level to the second energy level 4.58 x 10-19 J of energy is released What is the frequency of the photon that is produced?

Answers

Answer:  

e=hf conversion

hope it helps! stay safe as always!

what is actually chemistry​

Answers

Answer:

Chemistry is the branch of science that deals with the properties, composition, and structure of elements and compounds, how they can change, and the energy that is released or absorbed when they change.

Answer:

Well my  teacher said a more complex way he said chemistry is the science that deals with the properties, composition, and structure of substances.

Explanation:

what was johann dobereiner contribution to the periodic table

Answers

Answer:

he introduced triads of similar chemical properties in periodic table.

Explanation:

Imagine you have two beakers. Both beakers are filled with the same amount of water. The water in both beakers is the same temperature as well. You add 50 g of Substance A to the first beaker and 50 g of Substance B to the second beaker. After stirring both beakers, there is a small pile of Substance A at the bottom of the first beaker. None of Substance B is visible in the second beaker. Which of the following statements is true?

A. Substance B is not soluble in water


B. Substance A is more soluble in water than Substance B


C. Substance A is less soluble in water than Substance B


D. Substance A is not soluble in water

Answers

Substance A is less soluble in water than Substance B.

In this experiment, we can see that small amount of substance A is present at the bottom of the beaker which means that some amount of substance A does not dissolve in water.

While on the other hand, no substance B is present at the bottom of beaker which shows that all the substance B is dissolved in water so we can made a conclusion that Substance A is less soluble in water than Substance B.

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which statement describes how the binary ionic compound cacl2 is named?

Answers

Calcium Chloride because it is a type 1 so the the anion ends with -ide

HELP ME PLEASE HURRY
The characteristics of two different types of reactions are shown below:

Reaction A: Electrons are gained by the atoms of an element.
Reaction B: Protons are lost by the atom of an element.

Which statement is true about the atoms of the elements that participate in the two reactions?

Their identity changes in both Reaction A and Reaction B.
Their identity changes in Reaction A but not in Reaction B.
Their identity changes in Reaction B but not in Reaction A.
Their identity remains the same in both Reaction A and Reaction B.

Answers

Answer:

D is correct

Explanation:

Answer:

A

Explanation:

Electrons are gained by the atoms. There is no change in the nucleus of the atom and the number of protons remains identical.

An ion is:

Select one:

a.
An atom with an extra neutron.

b.
An atom or molecule with an electrical charge.

c.
The outermost shell of an atom.

Answers

The answer is b) an atom with an extra neutron.


The outermost shell of an atom is known as a valence shell.

An atom with an extra neutron is an isotope.

people tint their car windows to stop what

Answers

Answer:

Reflection

Explanation:

Answer:

b

Explanation:

What is an active metal?
A. a metal that reacts with oxygen
B. a metal that is above hydrogen in the activity series
C. a transition metal
D. a metal with only one valence electron

Answers

Answer:

A metal is said to be an active metal when it reacts strongly and quickly with other elements due to the electrons in its structure and its ease of sharing the electrons with other elements. ... A metal's reactivity increases as we go from the top to the bottom of the periodic table.

Explanation:

name any two chemical required for preparation of ammonia gas​

Answers

Answer:

Ammonium chloride and slacked lime

Explanation:

We can generate ammonia gas in the research centre by slowly heating ammonium chloride (NH4Cl) and slaked lime [Ca(OH)2]. Ammonia gas is lighter than air, requiring its accumulation by the descending displacement of air.

True or false? The empirical formula of a compound is the simplest formula that shows the numerical relationship of the elements in the compound.

Answers

Answer:

True

Explanation:

the empirical formula usually shows us the atoms' symbols and then how much of them are present in this certain compound. For example there is H2O

what happens to glucose in the body?

Answers

After your body has used all the energy it needs, leftover glucose is stored in the liver and muscles. We can store enough fuel for about a day, if you haven't eaten in a while, your blood glucose level drops. :)

Hope this helps!

Look at the diagram of metallic bonding. The light blue area represents a sea of... what?

Answers

Answer:

try elcetrons

Explanation:

if not then i'm sorry

The light blue area represents electrons.

What is an electron?

An electron is a negatively charged subatomic particle. It can be either free (not attached to any atom) or bound to the nucleus of an atom. Electrons in atoms exist in spherical shells of various radii, representing energy levels. The larger the spherical shell, the higher the energy contained in the electron.

What is the role of electrons?

Electrons play an essential role in numerous physical phenomena, such as electricity, magnetism, chemistry and thermal conductivity, and they also participate in gravitational, electromagnetic and weak interactions.

Learn more about electrons here: brainly.com/question/25674345

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Estimate the pressure of 16.25 moles of methane on a 10l container at 300k. Round to the nearest atmosphere

Answers

Answer:

The pressure of 16.25 moles of methane = 40 atm

Explanation: there you go

any process that results in the formation of an ion
The energy required to cause a gaseous atom or ion to release a electron is what?

Answers

Answer:

Ionization is the process by which ions are formed by gain or loss of an electron from an atom or molecule.

How does thermal energy flow?

Answers

Answer:

Thermal energy typically flows from a warmer material to a cooler material.

Explanation:

which of the following types of radiation can be blocked with only a sheet of paper?

beta decay, gamma decay, they are equally dangerous, alpha decay

Answers

Answer:

Alpha decay

Explanation:

Alpha decay can be blocked with only a sheet of paper.

Extra info : -

In general, alpha particles have a very limited ability to penetrate other materials. In other words, these particles of ionizing radiation can be blocked by a sheet of paper, skin, or even a few inches of air.

Hello there!

Alpha decay can be blocked with only a sheet of paper.Gamma rays can only be blocked with something thick and dense.Beta rays can be blocked with something less dense, but thicker than paper.

Hope this helps. Let me know if you have any questions.

~GracefulGirlie :)

Good luck on your assignment.

the process by which glucose is converted to starch is known as

Answers

Answer:

polymerization

Explanation:

Glucose is converted into starch by the process called polymerization. In polymerization, several simple and soluble molecules of glucose are put together to form a complex, insoluble molecule of starch.

Glucose is soluble , so it is converted to starch so that it can become insoluble and hence it cannot escape from cell , thus it can also be stored.

What happens in cellular respiration?

Answers

The answer would be B.

When glucose reacts with oxygen, it forms an ATP that is used by the given cell. Co2 and h2O are the byproducts.

which term best describes a unit of carbon dioxide?

Answers

Answer:

Molecule.

Explanation:

carbon and fluorine. Based on the bonding, a unit of carbon dioxideis described as a molecule.

Which of the following liquids has the highest viscosity
A water
B oil
C milk
D honey

Answers

Answer:

honey has the highest viscosity

According to the given option, honey is the liquid that has the highest viscosity. So, the correct option is D.

What do you mean by Viscosity?

Viscosity may be defined as the effects of a liquid by probity of which an internal resistance comes into play when the liquid is in movement and resists the comparable motion between its distinct layers.

Among all the given options, honey possesses more strong intermolecular attractive forces that result in the high compaction of particles in the honey.

After honey, Oil is more viscous followed by milk, and then water.

Therefore, the correct option for this question is D.

To learn more about Viscosity, refer to the link:

https://brainly.com/question/2684299

#SPJ2

Like the success of animals, the success of plants is limited based on the resources available to each individual. In the tropical
rainforest, plants are especially limited by the spate they have available to grow and reproduce. Which of these statements
describes a way that limited space will impact
the success of a plant in the rainforest? (SC.7.L.17.3)
A plant without enough space will face increased predation from herbivores
a
O A plant without enough space will not have as many parasites and diseases.
3
A plant without enough space will be more likely to be impacted by air quality
A plant without enough space will not be able to capture enough light to grow.

Answers

A plant without enough space to grow may be impacted by inadequate air as well as light for proper growth.

The competition for space in the tropical rainforest has impacts on two processes:

Light for photosynthesisAir for growth

Light is very important for photosynthesis and the overall well-being of plants. In a tight space, light and air become limited. This means that plants growing in such a space will not be able to photosynthesize optimally.

Plant roots need air to function properly and when becomes inadequate, the entire plant becomes negatively impacted.

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100 PIONTSSSS PLZ HELP
Draw the correct structural formula for the following molecules

Answers

Answer:

Explanation:

how do u draw on here

The intermolecular forces between polymer molecules are strong, so these substances are __________ at room temperature. What word completes the sentence?

Answers

Answer:

I want to say

Stronger

What are some examples of a physical change? (list more than 2 examples)

Answers

Answer:

Examples of physical change include changes in the size or shape of matter. Changes of state, for example, from solid to liquid or from liquid to gas, are also physical changes. Some of the processes that cause physical changes include cutting, bending, dissolving, freezing, boiling, and melting.

Explanation:

I hope this helps

1. Crushing a can
2. Balling up a piece of paper
3. Boiling water
4. Breaking a glass cup
5. Melting ice
6. Chopping up wood
7. Cutting paper
8. Burning plastic
9. Mixing water and dirt
10. Butter melting
PLEASE MARK AS BRAINLEST

How many atoms le aluminum are in this compound

Answers

I think it’s 2, hope this helps

Which of the following is not a use of radioactive isotopes?
a) Energy generation
b) Carbon dating
c) Chemotherapy
d) Radiotherapy

Answers

Answer:

i belive the answer you are looking for is A.. hope this helps!

Explanation:

im not really 100% certain of this answer due to the fact i am a little rusty.

Its A ‏ Believe me I got it on the test
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