Stoichiometry is like a recipe because... (choose the BEST answer; all answers below are correct)

you need certain ratios of ingrediants to get the right product of food

you are mixing ingrediants together

you need a formula (recipe) to make your product

you have to convert units

1

Now, let's take it up a notch!

mole ratio !!! (moles to moles)

A major part of stoichiometry is deciding what steps need to be taken to get from your given amount to your wanted amount.

Your template is designed to help you make those choices and to set up each conversion factor correctly.

We are going to start with just determining what steps need to be taken. Example: grams of given --> moles of given --> moles of wanted --> liters of wanted.

A conversion factor has to connect each of the steps, or your answer may be wrong.

Ex: How do you convert 23 inches to feet?

You use 12 in = 1 ft conversion factor.

Ex: How do you convert from 18.02 grams of water to moles?

You use 18.02 g of water = 1 mol of water conversion factor.

Ex: How do you convert from 5 moles of water to ? moles of hydrgoen?

You use a balanced chemcial eqaution to get the conversion factor:

2 H₂ + 1 O₂ --> 2 H₂O

Conversion factor = mole ratio, which for water to hydrogen is 2:2 (2 mol H²O = 2 mol H₂)

You pick out the steps that you will need to write out to reach your solution (answer).

Continue and see how you do. Watch below if you want a demo on how it works.

Note: answers progress from red, orange, yellow, green. It takes more than one correct placement to get it to orange, and it turns green before you get them all correct. Watch your points to see if you get each correct.

Stoichiometry (measurement of elements)

is a common science used daily.

Stoichiometry uses chemical reactions as recipies

to determine how much of the reactants (ingidents)

are needed to make a certain amount of product (cake or sandwhich or water food item you were making).

For example:

•Pharmaceuticals

–Production cost of excess

–Ingesting medicine

–Insulin

-How much medicine does a person need

-How to calculate the amount of ingredients you need to make a certain medicne

•Cosmetic Industry

–Coloring hair (mixing these ingredients with the wrong ratio would be a disaster)

•Engineers

–Fuel Mix to produce energy needed

–Airbags (correct amount of nitrogen gas produced to inflate air bag)

•Food Chemistry

–Baking (too little baking soda, flat cake)

Ɛhia

1

Consider this:
If you want to make 5 sandwhiches, how many pieces of bread do you need?

1

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1

Here is a ONE STEP example of stoichiometry.

null

_{Eventurally we will get to this:}

3 STEP STOICHIOMETRY

null

1

Do you start with your given or what you want?

given in problem

what you want

1

What goes on top of the mole ratio?
(Hint: you put your trophy on the top of the table and your trash on the ground)

want units

given units

1

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1

Moles to Moles

How many moles of NO would be produced if 13.8 moles of O₂ reacted?

Notice the green color is where you start, and the red color is what you want (your endpoint).

Match the correct values and units so mols of O₂ cancel out, and you are left with mol NO.

Given goes on the ground, diagonally down. (A)

What you WANT goes on top. (B)

MAKE SURE YOUR UNITS cancel out.

Mmuae Afoforo a Wobɛpaw:

17.25

4 mol NO

5 mol O2

1 mol NO

1 mol O2

11.07

13.80

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1

MOLES to MOLES

If 36.1 moles of water were produced, how many moles of oxygen would be needed?

Notice the green color is where you start and the red color is what you want (your end point).

Match the correct values and units, start with the given (36.1 moles of water) and then convert to mols of O₂.

A: Given goes on the ground, diagonally down.

B: What you WANT goes on top.

MAKE SURE YOUR UNITS cancel out.

Mmuae Afoforo a Wobɛpaw:

36.1 mol O2

43.32 mol O2

36.1 mol H2O

6 mol H2O

1 mol O2

30.08 mol O2

1 mol H2O

5 mol O2

6 mol O2

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1

MOLES to MOLES to GRAMS

Find the number of moles of NH3 needed to produce 60.5 moles of NO if enough O₂ reacts.

A: Given goes on the ground, diagonally down.

B: What you WANT goes on top.

MAKE SURE YOUR UNITS cancel out.

Mmuae Afoforo a Wobɛpaw:

241.6 mol NH3

? mol NO

1 mol NH3

1 mol NO

15.13 mol NH3

4 mol NO

? mol NH3

4 mol NH3

60.5 mol NH3

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1

Hint: the molar mass of water is 18.02 g/mol (H: 2 * 1.01) + (O: 1 * 16.00) = 18.02 g/mol

A: Given goes on the ground, diagonally down.

B: What you WANT goes on top.

MAKE SURE YOUR UNITS cancel out.

Mmuae Afoforo a Wobɛpaw:

564.80 g H2O

4 mol NH3

376.62 g H2O

6 mol H2O

1 mol H2O

18.02 g/mol

18.02 g H2O

1.74 g H2O

31.35 mol H2O

1 mol NH3

1

What is the value of Avogadro's number?

2.03 x 10³⁶

6.02 x 10²³

2.06 x 10²³

6.06 x 10²³

1

A molecule of Al₂(SO₄)₃ contains:

4 O atoms

12 S atoms

6 Al atoms

12 O atoms

2

Match the coefficients with the correct substance and number of atoms for each element in the following equation: 2 C₄H₁₀ + 13 O₂ -> 8 CO₂ + 10 H₂O

Draggable item		Corresponding Item
2 molecules		O₂
8 molecules		C₄H₁₀
8 atoms		CO₂
20 atoms		H₂0
26 atoms		C on one side of the reaction
13 molecules		H on one side of the reaction
10 molecules		O on one side of the reaction

1

REVIEW: How many moles of magnesium is 3.01 x 10²² atoms of magnesium?
This is a two-step mole conversion problem.

1

REVIEW: Determine the volume, in liters, occupied by 0.030 moles of a gas at STP.
This is a two-step mole conversion problem.

1

How many grams is 4 moles of NaCl?

40 g

0.07 g

58.5 g

234 g

Some mole practice quesitons!

Here are some reminders about moles

What is a mole?

A mole is a big number of things.

How big is a mole?

Very big.

6.02 X 10²³or about a trillion trillion.

How many atoms of carbon are in one mole of carbon?

6.02 X 10²³atoms of carbon

What is the mass of one mole of carbon atoms?

12.0111g

1

What is the mass of 1 mole of an atom of hydrogen (H)?

1

What is the mass of 1 mole of hydrogen gas (H₂)?

1

How many atoms are in ONE mole of the lead (Pb) contains?
1 mol of Pb = ?__ atoms of Pb

1

What is the mass of one mole of the element lead?

1

How many atoms of carbon are needed to make one molecule of CS₂?

1

2

3

4

1

How many atoms of sulfur are needed to make one molecule of CS₂?

1

2

3

4

1

The abbreviation mol means mole or moles. To make 1 mol of carbon disulfide (CS₂) molecules requires how many moles of carbon atoms?

1

2

3

4

1

The abbreviation mol means mole or moles. To make 1 mol of carbon disulfide (CS₂) molecules requires how many moles of sulfur atoms?

1

2

3

4

1

One mole of carbon tetrachloride (CCl₄) requires how many moles of carbon atoms?

1

One mole of carbon tetrachloride (CCl₄) requires how many moles of chlorine atoms?

1

What are the units for molar mass? (hint: mass/furry animal)

3

What is a mole? Select all that apply.

a number that represents a very LARGE number

word that means a number

6.022 x 10²³

a word that chemists use to categorize chemical reactions

a number that represents a very SMALL number

1

What are the coefficents for this reaction? Include ones if needed
Format: no commas, no spaces, only numbers
ex: 1212

1

What are the coefficents for this mole ratio? Include ones if needed
Format: number colon number
ex: 3:1 or 2:2 or 1:4

1

What are the coefficents for this mole ratio? Include ones if needed
Format: number colon number
ex: 3:1 or 2:2 or 1:4

1

What are the coefficents for this reaction? Include ones if needed
Format: no commas, no spaces, only numbers
ex: 1212

1

What are the coefficents for this mole ratio? Include ones if needed
Format: number colon number
ex: 3:1 or 2:2 or 1:4

1

What are the coefficents for this mole ratio? Include ones if needed
Format: number colon number
ex: 3:1 or 2:2 or 1:4

1

What are the coefficents for this reaction? Include ones if needed
Format: no commas, no spaces, only numbers
ex: 1212
HINT: When all of your Carbons and Hydrogens are balanced, then multiply each coefficient by 2 to help you.

1

What are the coefficents for this mole ratio? Include ones if needed
Format: number colon number
ex: 3:1 or 2:2 or 1:4

1

What are the coefficents for this mole ratio? Include ones if needed
Format: number colon number
ex: 3:1 or 2:2 or 1:4

1

What are the coefficents for this reaction? Include ones if needed
Format: no commas, no spaces, only numbers
ex: 1212

1

What are the coefficents for this mole ratio? Include ones if needed
Format: number colon number
ex: 3:1 or 2:2 or 1:4

1

What are the coefficents for this mole ratio? Include ones if needed
Format: number colon number
ex: 3:1 or 2:2 or 1:4

1

Given the balanced equation 2H₂O -> 2H₂ + O₂, if you begin the reaction with 4 moles of H2O, how many moles of O2 will you obtain?

1

In the balanced equation 2 Fe₂O₃ -> 4 Fe + 3 O₂, if you start with 10 moles of Fe₂O₃, how many moles of Fe will you produce?

1

According to the balanced equation 3H2 + N2 -> 2NH3, if you utilize 9 moles of H2, how many moles of NH3 can you produce?

1

Using the balanced equation 2Na + Cl2 -> 2NaCl, if you start with 8 moles of Na, how many moles of NaCl will you achieve?

1

2. Given the balanced chemical equation: NH₃ + O₂ -> NO + H₂O, calculate the number of moles of Nitrogen Oxide (NO) produced from 8 moles of Ammonia (NH3).

1

In the reaction water, where hydrogen and oxygen gases are mixed, how many moles of Oxygen (O₂) are needed to react with 4 moles of Hydrogen (H₂)? (Hint: Write your balanced equation first!

Mole to Mole Set Up Practice

Mole to Mole Set Up Practice

Stoichiometry is like a recipe because... (choose the BEST answer; all answers below are correct)

Stoichiometry (measurement of elements)

Stoichiometry uses chemical reactions as recipies

to determine how much of the reactants (ingidents)

are needed to make a certain amount of product (cake or sandwhich or water food item you were making).

Consider this:If you want to make 5 sandwhiches, how many pieces of bread do you need?

Here is a ONE STEP example of stoichiometry.

Eventurally we will get to this:

3 STEP STOICHIOMETRY

Do you start with your given or what you want?

What goes on top of the mole ratio?(Hint: you put your trophy on the top of the table and your trash on the ground)

What is the value of Avogadro's number?

A molecule of Al2(SO4)3 contains:

Match the coefficients with the correct substance and number of atoms for each element in the following equation: 2 C4H10 + 13 O2 -> 8 CO2 + 10 H2O

REVIEW: How many moles of magnesium is 3.01 x 1022 atoms of magnesium?This is a two-step mole conversion problem.

REVIEW: Determine the volume, in liters, occupied by 0.030 moles of a gas at STP.This is a two-step mole conversion problem.

How many grams is 4 moles of NaCl?

What is the mass of 1 mole of an atom of hydrogen (H)?

What is the mass of 1 mole of hydrogen gas (H2)?

How many atoms are in ONE mole of the lead (Pb) contains?1 mol of Pb = ______?________ atoms of Pb

1 mol of Pb = ______?________ atoms of Pb

What is the mass of one mole of the element lead?

How many atoms of carbon are needed to make one molecule of CS2?

How many atoms of sulfur are needed to make one molecule of CS2?

The abbreviation mol means mole or moles. To make 1 mol of carbon disulfide (CS2) molecules requires how many moles of carbon atoms?

The abbreviation mol means mole or moles. To make 1 mol of carbon disulfide (CS2) molecules requires how many moles of sulfur atoms?

One mole of carbon tetrachloride (CCl4) requires how many moles of carbon atoms?

One mole of carbon tetrachloride (CCl4) requires how many moles of chlorine atoms?

What are the units for molar mass? (hint: mass/furry animal)

What is a mole? Select all that apply.

What are the coefficents for this reaction? *Include ones if needed* Format: no commas, no spaces, only numbersex: 1212

What are the coefficents for this mole ratio? *Include ones if needed* Format: number colon numberex: 3:1 or 2:2 or 1:4

What are the coefficents for this mole ratio? *Include ones if needed*Format: number colon numberex: 3:1 or 2:2 or 1:4

What are the coefficents for this reaction? *Include ones if needed* Format: no commas, no spaces, only numbersex: 1212

What are the coefficents for this mole ratio? *Include ones if needed* Format: number colon numberex: 3:1 or 2:2 or 1:4

What are the coefficents for this mole ratio? *Include ones if needed*Format: number colon numberex: 3:1 or 2:2 or 1:4

What are the coefficents for this reaction? *Include ones if needed* Format: no commas, no spaces, only numbersex: 1212HINT: When all of your Carbons and Hydrogens are balanced, then multiply each coefficient by 2 to help you.

What are the coefficents for this mole ratio? *Include ones if needed* Format: number colon numberex: 3:1 or 2:2 or 1:4

What are the coefficents for this mole ratio? *Include ones if needed*Format: number colon numberex: 3:1 or 2:2 or 1:4

What are the coefficents for this reaction? *Include ones if needed* Format: no commas, no spaces, only numbersex: 1212

What are the coefficents for this mole ratio? *Include ones if needed* Format: number colon numberex: 3:1 or 2:2 or 1:4

What are the coefficents for this mole ratio? *Include ones if needed* Format: number colon numberex: 3:1 or 2:2 or 1:4

Given the balanced equation 2H2O -> 2H2 + O2, if you begin the reaction with 4 moles of H2O, how many moles of O2 will you obtain?

In the balanced equation 2 Fe2O3 -> 4 Fe + 3 O2, if you start with 10 moles of Fe2O3, how many moles of Fe will you produce?

According to the balanced equation 3H2 + N2 -> 2NH3, if you utilize 9 moles of H2, how many moles of NH3 can you produce?

Using the balanced equation 2Na + Cl2 -> 2NaCl, if you start with 8 moles of Na, how many moles of NaCl will you achieve?

2. Given the balanced chemical equation: __ NH3 + __O2 -> __NO + __H2O, calculate the number of moles of Nitrogen Oxide (NO) produced from 8 moles of Ammonia (NH3).

In the reaction water, where hydrogen and oxygen gases are mixed, how many moles of Oxygen (O2) are needed to react with 4 moles of Hydrogen (H2)? (Hint: Write your balanced equation first!

For example:

1 N2 + 2 O2 --> 2 NO2

1 mole N2 to 2 moles NO2

or

1 to 2

or

1 : 2

It will be okay!

Other Visual Examples:

But for TODAY,

Good job reading all the above. Let me know if you have questions. :-) But ask three different groups/tables and then ask me.

Complete the next section, where you will apply this knowledge to actual problems.

Stoichiometry is like a recipe because... (choose the BEST answer; all answers below are correct)

You must always convert to...

In a balanced chemical equation, you use the _______ to convert from moles of X to moles of Y.

Stoichiometry (measurement of elements)

Stoichiometry uses chemical reactions as recipies

to determine how much of the reactants (ingidents)

are needed to make a certain amount of product (cake or sandwhich or water food item you were making).

Consider this:If you want to make 7 sandwhiches, how many pieces of bread do you need?

Consider this:If you want to make 5 sandwhiches, how many pieces of bread do you need?

Consider this:If you have 9 cheese slices, how many sandwiches can you make?

Consider this:How many eggs do I need to make 25 pancakes?

What must you always have in order to convert from one compound to another compound?

Which examples below are examples of the concept of stoichiometry?

Here is a ONE STEP example of stoichiometry.

Eventurally we will get to this:

3 STEP STOICHIOMETRY

Do you start with your given or what you want?

What is your given in the first 1 step stoichiometry example?

Consider this:
If you want to make 5 sandwhiches, how many pieces of bread do you need?

_{Eventurally we will get to this:}

What goes on top of the mole ratio?
(Hint: you put your trophy on the top of the table and your trash on the ground)

A molecule of Al₂(SO₄)₃ contains:

Match the coefficients with the correct substance and number of atoms for each element in the following equation: 2 C₄H₁₀ + 13 O₂ -> 8 CO₂ + 10 H₂O

REVIEW: How many moles of magnesium is 3.01 x 10²² atoms of magnesium?
This is a two-step mole conversion problem.

REVIEW: Determine the volume, in liters, occupied by 0.030 moles of a gas at STP.
This is a two-step mole conversion problem.

What is the mass of 1 mole of hydrogen gas (H₂)?

How many atoms are in ONE mole of the lead (Pb) contains?
1 mol of Pb = ?__ atoms of Pb

1 mol of Pb = ?__ atoms of Pb

How many atoms of carbon are needed to make one molecule of CS₂?

How many atoms of sulfur are needed to make one molecule of CS₂?

The abbreviation mol means mole or moles. To make 1 mol of carbon disulfide (CS₂) molecules requires how many moles of carbon atoms?

The abbreviation mol means mole or moles. To make 1 mol of carbon disulfide (CS₂) molecules requires how many moles of sulfur atoms?

One mole of carbon tetrachloride (CCl₄) requires how many moles of carbon atoms?

One mole of carbon tetrachloride (CCl₄) requires how many moles of chlorine atoms?

What are the coefficents for this reaction? Include ones if needed
Format: no commas, no spaces, only numbers
ex: 1212

What are the coefficents for this mole ratio? Include ones if needed
Format: number colon number
ex: 3:1 or 2:2 or 1:4

What are the coefficents for this mole ratio? Include ones if needed
Format: number colon number
ex: 3:1 or 2:2 or 1:4

What are the coefficents for this reaction? Include ones if needed
Format: no commas, no spaces, only numbers
ex: 1212

What are the coefficents for this mole ratio? Include ones if needed
Format: number colon number
ex: 3:1 or 2:2 or 1:4

What are the coefficents for this mole ratio? Include ones if needed
Format: number colon number
ex: 3:1 or 2:2 or 1:4

What are the coefficents for this reaction? Include ones if needed
Format: no commas, no spaces, only numbers
ex: 1212
HINT: When all of your Carbons and Hydrogens are balanced, then multiply each coefficient by 2 to help you.

What are the coefficents for this mole ratio? Include ones if needed
Format: number colon number
ex: 3:1 or 2:2 or 1:4

What are the coefficents for this mole ratio? Include ones if needed
Format: number colon number
ex: 3:1 or 2:2 or 1:4

What are the coefficents for this reaction? Include ones if needed
Format: no commas, no spaces, only numbers
ex: 1212

What are the coefficents for this mole ratio? Include ones if needed
Format: number colon number
ex: 3:1 or 2:2 or 1:4

What are the coefficents for this mole ratio? Include ones if needed
Format: number colon number
ex: 3:1 or 2:2 or 1:4

Given the balanced equation 2H₂O -> 2H₂ + O₂, if you begin the reaction with 4 moles of H2O, how many moles of O2 will you obtain?

In the balanced equation 2 Fe₂O₃ -> 4 Fe + 3 O₂, if you start with 10 moles of Fe₂O₃, how many moles of Fe will you produce?

2. Given the balanced chemical equation: NH₃ + O₂ -> NO + H₂O, calculate the number of moles of Nitrogen Oxide (NO) produced from 8 moles of Ammonia (NH3).

In the reaction water, where hydrogen and oxygen gases are mixed, how many moles of Oxygen (O₂) are needed to react with 4 moles of Hydrogen (H₂)? (Hint: Write your balanced equation first!

Consider this:
If you want to make 7 sandwhiches, how many pieces of bread do you need?

Consider this:
If you want to make 5 sandwhiches, how many pieces of bread do you need?

Consider this:
If you have 9 cheese slices, how many sandwiches can you make?

Consider this:
How many eggs do I need to make 25 pancakes?

_{Eventurally we will get to this:}

What goes on top of the mole ratio?
(Hint: you put your trophy on the top of the table and your trash on the ground)

What goes on at the bottom of your mole ratio?
(Hint: you put your trophy on the top of the table and your trash on the ground)

A molecule of Al₂(SO₄)₃ contains:

Match the coefficients with the correct substance and number of atoms for each element in the following equation: 2 C₄H₁₀ + 13 O₂ -> 8 CO₂ + 10 H₂O

REVIEW: How many moles of magnesium is 3.01 x 10²² atoms of magnesium?
This is a two-step mole conversion problem.

REVIEW: Determine the volume, in liters, occupied by 0.030 moles of a gas at STP.
This is a two-step mole conversion problem.

What is the mass of 1 mole of hydrogen gas (H₂)?

How many atoms are in ONE mole of the lead (Pb) contains?
1 mol of Pb = ?__ atoms of Pb

1 mol of Pb = ?__ atoms of Pb

How many atoms of carbon are needed to make one molecule of CS₂?

How many atoms of sulfur are needed to make one molecule of CS₂?

The abbreviation mol means mole or moles. To make 1 mol of carbon disulfide (CS₂) molecules requires how many moles of carbon atoms?

The abbreviation mol means mole or moles. To make 1 mol of carbon disulfide (CS₂) molecules requires how many moles of sulfur atoms?

One mole of carbon tetrachloride (CCl₄) requires how many moles of carbon atoms?

One mole of carbon tetrachloride (CCl₄) requires how many moles of chlorine atoms?

What are the coefficents for this reaction? Include ones if needed
Format: no commas, no spaces, only numbers
ex: 1212

What are the coefficents for this mole ratio? Include ones if needed
Format: number colon number
ex: 3:1 or 2:2 or 1:4

What are the coefficents for this mole ratio? Include ones if needed
Format: number colon number
ex: 3:1 or 2:2 or 1:4

What are the coefficents for this mole ratio? Include ones if needed
Format: number colon number
ex: 3:1 or 2:2 or 1:4

What are the coefficents for this mole ratio? Include ones if needed
Format: number colon number
ex: 3:1 or 2:2 or 1:4

What are the coefficents for this reaction? Include ones if needed
Format: no commas, no spaces, only numbers
ex: 1212

What are the coefficents for this mole ratio? Include ones if needed
Format: number colon number
ex: 3:1 or 2:2 or 1:4

What are the coefficents for this mole ratio? Include ones if needed
Format: number colon number
ex: 3:1 or 2:2 or 1:4

What are the coefficents for this mole ratio? Include ones if needed
Format: number colon number
ex: 3:1 or 2:2 or 1:4
DO NOT SIMPLIFY!!!!*
6 mols : 3 moles stays 6:3 NOT 3:2 :-)

What are the coefficents for this mole ratio? Include ones if needed
Format: number colon number
ex: 3:1 or 2:2 or 1:4

What are the coefficents for this reaction? Include ones if needed
Format: no commas, no spaces, only numbers
ex: 1212
HINT: When all of your Carbons and Hydrogens are balanced, then multiply each coefficient by 2 to help you.

What are the coefficents for this mole ratio? Include ones if needed
Format: number colon number
ex: 3:1 or 2:2 or 1:4

What are the coefficents for this mole ratio? Include ones if needed
Format: number colon number
ex: 3:1 or 2:2 or 1:4

What are the coefficents for this mole ratio? Include ones if needed
Format: number colon number
ex: 3:1 or 2:2 or 1:4

What are the coefficents for this mole ratio? Include ones if needed
Format: number colon number
ex: 3:1 or 2:2 or 1:4

What are the coefficents for this reaction? Include ones if needed
Format: no commas, no spaces, only numbers
ex: 1212

What are the coefficents for this mole ratio? Include ones if needed
Format: number colon number
ex: 3:1 or 2:2 or 1:4

What are the coefficents for this mole ratio? Include ones if needed
Format: number colon number
ex: 3:1 or 2:2 or 1:4

What are the coefficents for this mole ratio? Include ones if needed
Format: number colon number
ex: 3:1 or 2:2 or 1:4

What are the coefficents for this mole ratio? Include ones if needed
Format: number colon number
ex: 3:1 or 2:2 or 1:4

Given the balanced equation 2H₂O -> 2H₂ + O₂, if you begin the reaction with 4 moles of H2O, how many moles of O2 will you obtain?

In the balanced equation 2 Fe₂O₃ -> 4 Fe + 3 O₂, if you start with 10 moles of Fe₂O₃, how many moles of Fe will you produce?

2. Given the balanced chemical equation: NH₃ + O₂ -> NO + H₂O, calculate the number of moles of Nitrogen Oxide (NO) produced from 8 moles of Ammonia (NH3).

In the reaction water, where hydrogen and oxygen gases are mixed, how many moles of Oxygen (O₂) are needed to react with 4 moles of Hydrogen (H₂)? (Hint: Write your balanced equation first!