Mole Ratio Quizizz

​Mole Ratio Review

​Remember, a mole ratio is comparing coefficients

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​Mole Ratio Review

​What if I had 4 moles of H₂? (a) How much N₂ would I need? (b)How much NH₃ could I make?

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​Mole Ratio Review

​What if I had 4 moles of H₂? (a) How much N₂ would I need? (b)How much NH₃ could I make?

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​Mole Ratio Review

​What if I made 1.25 moles of NH₃? (a)How much N₂ would I need? (b)How much H₂ would I need?

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​Mole Ratio Review

​What if I made 1.25 moles of NH₃? (a)How much N₂ would I need? (b)How much H₂ would I need?

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Multiple Choice

How many moles of CH4 are needed to make 6 moles of H2O in the following equation:

CH4 + 2O₂ --> CO₂ + 2H₂O

• 6

• 3

• 1/3

• 12

Fill in the Blank

Mole ratio is a way to compare compounds in a balanced chemical equations by looking at the ____________________________.

Multiple Choice

What can be determined from a balanced chemical equation?

• mole ratio of any two substances in the reaction

• total energy released from the reaction

• electron configuration of all elements in the reaction

• sequence of events that lead to formation of products

Multiple Choice

Mg + 2HCl → MgCl₂ + H₂

When 1 mole of HCl is used, how many moles of MgCl₂ will be produced?

• 2 mol

• 1 mol

• 0.5 mol

• 4 mol

Multiple Choice

H₂ + Cl₂ → 2HCl

What is the total number of moles of HCl produced after 3 moles of H₂ is completely used up?

• 2 mol

• 3 mol

• 5 mol

• 6 mol

Multiple Choice

2Na + S → Na₂S

8 moles of sodium reacted with an excess of sulfur to produce sodium sulfide. What is the number of moles of sodium sulfide produced?

• 1 mol

• 2 mol

• 0.5 mol

• 4 mol

Multiple Choice

4NH₃ + 5O₂ → 4NO + 6H₂O

In order to produce 2 moles of NO, how many moles of O₂ have to be used?

• 2.5 mol

• 4 mol

• 5 mol

• 10 mol

Multiple Choice

6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂

What is the total number of moles of water needed to make 2.5 moles of C₆H₁₂O₆?

• 2.5 mol

• 6 mol

• 12 mol

• 15 mol

Multiple Choice

Fe₂O₃ + 3H₂ → 2Fe + 3H₂O

How many moles of Fe can be made from 12 moles of H₂?

• 2 mol

• 4 mol

• 6 mol

• 8 mol

Multiple Choice

CH₄ + 2O₂ → CO₂ + 2H₂O

If 3 moles of oxygen gas are used for burning all methane present, how many moles of carbon dioxide are produced?

• 0.5 mol

• 1.5 mol

• 2 mol

• 2.5 mol

Multiple Choice

2CH₃OH + 3O₂ → 2CO₂ + 4H₂O

If 16 moles of carbon dioxide are formed by this reaction, how many moles of water were also produced?

• 8 mol

• 16 mol

• 24 mol

• 32 mol

Multiple Choice

2 C₂H₆ + 7 O₂ → 4 CO₂ + 6 H₂O

Ethane (C₂H₆) combusts in the above reaction. What is the mole ratio of ethane to oxygen gas?

Multiple Choice

2 C₂H₆ + 7 O₂ → 4 CO₂ + 6 H₂O

Ethane (C₂H₆) combusts in the above reaction. What is the mole ratio of carbon dioxide to water?

Multiple Choice

2 C₂H₆ + 7 O₂ → 4 CO₂ + 6 H₂O

If 16 moles of carbon dioxide are formed by this reaction, how many moles of water were also produced?

• 4 mol H₂O

• 6 mol H₂O

• 24 mol H₂O

• 96 mol H₂O

• 384 mol H₂O

Multiple Choice

2H₂   +   O₂  →  2H₂O
How many moles of water can be produced if 8 moles H₂ are used?

• 4 moles
• 8 moles
• 16 moles
• 2 moles

Multiple Choice

4NH₃ + 5O₂ → 4NO + 6H₂O

What is the total number of moles of H₂O produced when 12 mole of NH₃ is completely consumed?

• 15

• 18

• 20

• 24

Multiple Choice

For the Balanced Reaction:
3 Mg + 1 Fe₂O₃ → 3 MgO + 2 Fe;
What is the Ratio of moles of Mg to moles Fe?

• 3mol Mg / 2 mol Fe
• 2 mol Mg/ 3 mol Fe
• 1 mol Fe/ 2 mol Fe
• 3 mol MgO / 2 mol Fe

Multiple Choice

N₂ + 3H₂ → 2NH₃

What is the total number of moles of NH₃ produced when 10 moles of H₂ reacts completely with N₂?

• 6.7

• 2.0

• 3.0

• 15.0

Multiple Choice

N₂ +  3H₂ → 2NH₃ 
How many moles of hydrogen are needed to react with 5 moles of nitrogen?

• 6 mol
• 2 mol
• 3 mol
• 15 mol

Multiple Choice

In the reaction
2 H₂ + O₂ → 2 H₂O
what is the mole ratio of oxygen to water

• 1:2
• 2:1
• 3:4
• 4:3

Multiple Choice

Where are the numbers for a mole ratio found?

• They are part of the chemical formula.

• They are given in the problem.

• They are found using the periodic table.

• They are found as coefficients in the balanced chemical equation.

Multiple Choice

In the balanced equation 2HgO → 2Hg + O₂, what is the mole ratio of HgO to O₂?

• 2 : 2

• 1 : 1

• 2 : 1

• 1 : 2

Multiple Choice

4NH₃ + 5O₂-->4NO + 6H₂O
What is the total number of moles of NO produced when 1 mole of O₂ is completely consumed?

• 1
• 1.2
• 0.8
• 4

Multiple Choice

In the balanced equation 2Al₂O₃ → 4Al + 3O₂, what is the mole ratio of aluminum to oxygen?

• 3 : 2

• 3 : 4

• 4 : 3

• 2 : 3

Multiple Choice

3Mg + Fe₂O₃ → 3MgO + 2Fe

What is the mole ratio of magnesium to iron?

• 3 : 2

• 2 : 3

• 1 : 2

• 3 : 1

Multiple Choice

2 C₂H₆ + 7 O₂ → 4 CO₂ + 6 H₂O

A problem asks how many moles of oxygen gas are needed to react completely with 6 moles of ethane (C₂H₆). What is the final answer for this problem?

• 13 mol C₂H₆

• 3 mol O₂

• 21 mol O₂

• 42 mol O₂

Multiple Choice

4NH₃ + 5O₂-->4NO + 6H₂O
What is the total number of moles of H₂O produced when 12 mole of NH₃ is completely consumed?

• 15
• 18
• 20
• 24

Multiple Choice

6CO₂ + 6H₂O --> C₆H₁₂O₆ + 6O₂ 
What is the total number of moles of water needed to make 2.5 moles of C₆H₁₂O₆?

• 2.5
• 6
• 12
• 15

Multiple Choice

2 C₂H₆ + 7 O₂ → 4 CO₂ + 6 H₂O

New problem: If 16 moles of carbon dioxide are formed by this reaction, how many moles of water were also produced?

• 4 mol H₂O

• 6 mol H₂O

• 24 mol H₂O

• 96 mol H₂O

• 384 mol H₂O

Multiple Choice

2 C₂H₆ + 7 O₂ → 4 CO₂ + 6 H₂O

New problem: If 3.5 moles of oxygen gas are used up as ethane combusts completely, how many moles of carbon dioxide are produced?

• 0.5 mol CO₂

• 0.57 mol CO₂

• 2.0 mol CO₂

• 3.0 mol CO₂

• 3.5 mol CO₂

Multiple Choice

N₂ + 3H₂ --> 2NH₃
What is the total number of moles of NH₃ produced when 10 moles of H₂ reacts completely with N₂?

• 6.7
• 2.0
• 3.0
• 15.0

Multiple Choice

N₂ + 3H₂ --> 2NH₃
How many moles of N₂ is needed to react with 6 moles of H₂?

• 6.7
• 2.0
• 3.0
• 15.0

Multiple Choice

2Na + S -->Na₂S
What is the total number of moles of S that reacts when 4.0 moles of Na were completely consumed?

• 1
• 2
• 0.5
• 4

Multiple Choice

2Na + S -->Na₂S
What is the total number of moles of Na₂S produced when 8.0 moles of Na were completely consumed?

• 1
• 2
• 0.5
• 4

Review of Formula Mass (Molar Mass)

​We're bringing this concept back

Formula mass (aka molar mass) is the:

(Mass of element * subscript) + (Mass of element * subscript)​

Ex: Al2O3 = (27 * 2) + (16 * 3)​ = 54 + 48 = 102 g/mole

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Review of Formula Mass (Molar Mass)

Formula mass (aka molar mass) is the:

(Mass of element * subscript) + (Mass of element * subscript)​. If there is a polyatomic ion in parentheses, distribute the # outside the parentheses to get the total number of that atom (multiply both subscripts)

Ex: Ca(NO₃)₂ = (40 * 1) + (14 * 1 *2)​ + (16 * 3 * 2)= 40 + 28 + 96

= 164 g/mole​

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Multiple Choice

What is the mass of one mole of aluminum?

• 27 g
• 13 g
• 54 g
• 14 g

Multiple Choice

What is the molar mass of AuCl₃?

• 96 g
• 130 g
• 232.5 g
• 303.3 g

Multiple Choice

The molar mass of an element is equal to its...

• Atomic mass
• Atomic number
• Oxidation number
• Valence electrons

Multiple Choice

Calculate the molar mass of Ba(C₂H₃O₂)₂

• 255.3 g/mol

• 237.3 g/mol

• 228.3 g/mol

• 196.3 g/mol

Multiple Choice

What is the molar mass of table salt (NaCl)?

• 116.886 g/mol
• 35.453 g/mol
• 22.990 g/mol
• 58.443 g/mol

Multiple Choice

What is the molar mass of CO₂?

• 12
• 16
• 32
• 44

​Mole Conversions

​1 mole of a substance is equal to:

1 mole = formula mass of the substance​

1 mole = 22.4 L of a gas at STP

(STP =standard temperature and pressure​ = 0 degrees Celsius and 1 atm)

1 mole = 6.02 x 10²³ particles

(a particle can be atoms, formula units of ionic/acidic compounds or molecules of covalent compounds​)

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