The Mole Ratio from a Balanced Equation

Question 1

For 4Al + 3O2 → 2Al2O3, which coefficient ratio gives mol Al to mol O2?

Accepted Answer

4 mol Al : 3 mol O2

Answer

3 mol Al : 4 mol O2

Answer

2 mol Al2O3 : 3 mol O2

Answer

4 mol Al : 2 mol Al2O3

Question 2

Given N2 + 3H2 → 2NH3, which factor converts moles of H2 to moles of NH3?

Accepted Answer

(2 mol NH3)/(3 mol H2)

Answer

(3 mol H2)/(2 mol NH3)

Answer

(1 mol N2)/(3 mol H2)

Answer

(3 mol H2)/(1 mol N2)

Question 3

In CH4 + 2O2 → CO2 + 2H2O, what is the mole ratio of CH4 to CO2?

Accepted Answer

1 mol CH4 : 1 mol CO2

Answer

1 mol CH4 : 2 mol CO2

Answer

2 mol CH4 : 1 mol CO2

Answer

2 mol CH4 : 2 mol CO2

Question 4

Which coefficient statement fits 2KClO3 → 2KCl + 3O2?

Accepted Answer

2 mol KClO3 produce 3 mol O2.

Answer

3 mol KClO3 produce 2 mol O2.

Answer

2 mol KCl produce 3 mol KClO3.

Answer

1 mol KClO3 produces 1 mol O2.

Question 5

Read 2C2H6 + 7O2 → 4CO2 + 6H2O. What is the mol O2 to mol CO2 ratio?

Accepted Answer

7 mol O2 : 4 mol CO2

Answer

4 mol O2 : 7 mol CO2

Answer

2 mol C2H6 : 4 mol CO2

Answer

7 mol O2 : 6 mol H2O

Question 6

For 4Fe + 3O2 → 2Fe2O3, pick the factor for converting mol Fe to mol Fe2O3.

Accepted Answer

(2 mol Fe2O3)/(4 mol Fe)

Answer

(4 mol Fe)/(2 mol Fe2O3)

Answer

(4 mol Fe)/(3 mol O2)

Answer

(3 mol O2)/(2 mol Fe2O3)

Question 7

No coefficient is printed before any formula in CaCO3 → CaO + CO2. What mole ratio relates CaCO3 to CO2?

Accepted Answer

1 mol CaCO3 : 1 mol CO2

Answer

1 mol CaCO3 : 2 mol CO2

Answer

2 mol CaCO3 : 1 mol CO2

Answer

3 mol CaCO3 : 1 mol CO2

Question 8

Which statement matches 2Na + Cl2 → 2NaCl?

Accepted Answer

2 mol Na react with 1 mol Cl2.

Answer

1 mol Na reacts with 2 mol Cl2.

Answer

2 mol Na react with 2 mol Cl2.

Answer

1 mol Na reacts with 1 mol Cl2.

Question 9

From P4 + 6Cl2 → 4PCl3, what coefficient ratio compares Cl2 to PCl3?

Accepted Answer

6 mol Cl2 : 4 mol PCl3

Answer

4 mol Cl2 : 6 mol PCl3

Answer

1 mol P4 : 6 mol Cl2

Answer

6 mol Cl2 : 1 mol P4

Question 10

For 2CO + O2 → 2CO2, choose the factor that changes moles of CO into moles of O2.

Accepted Answer

(1 mol O2)/(2 mol CO)

Answer

(2 mol CO)/(1 mol O2)

Answer

(2 mol CO2)/(2 mol CO)

Answer

(1 mol O2)/(2 mol CO2)

Question 11

In H2SO4 + 2NaOH → Na2SO4 + 2H2O, what is H2SO4 to Na2SO4?

Accepted Answer

1 mol H2SO4 : 1 mol Na2SO4

Answer

1 mol H2SO4 : 2 mol Na2SO4

Answer

2 mol H2SO4 : 1 mol Na2SO4

Answer

2 mol H2SO4 : 2 mol Na2SO4

Question 12

Select the statement that matches 4NH3 + 5O2 → 4NO + 6H2O.

Accepted Answer

4 mol NH3 react with 5 mol O2.

Answer

5 mol NH3 react with 4 mol O2.

Answer

4 mol NH3 produce 4 mol H2O.

Answer

6 mol O2 produce 4 mol NO.

Question 13

In 2Mg + O2 → 2MgO, what coefficient ratio should start a mol Mg to mol MgO conversion?

Accepted Answer

2 mol Mg : 2 mol MgO

Answer

2 mol Mg : 1 mol MgO

Answer

1 mol Mg : 2 mol MgO

Answer

1 mol O2 : 2 mol MgO

Question 14

For 3Ca(OH)2 + 2H3PO4 → Ca3(PO4)2 + 6H2O, which converts mol H3PO4 to mol H2O?

Accepted Answer

(6 mol H2O)/(2 mol H3PO4)

Answer

(2 mol H3PO4)/(6 mol H2O)

Answer

(3 mol Ca(OH)2)/(2 mol H3PO4)

Answer

(1 mol Ca3(PO4)2)/(6 mol H2O)

Question 15

Use C3H8 + 5O2 → 3CO2 + 4H2O. What is the C3H8 to CO2 mole ratio?

Accepted Answer

1 mol C3H8 : 3 mol CO2

Answer

3 mol C3H8 : 1 mol CO2

Answer

5 mol C3H8 : 3 mol CO2

Answer

1 mol C3H8 : 4 mol CO2

Question 16

Which statement uses the coefficients in 2H2O2 → 2H2O + O2 correctly?

Accepted Answer

2 mol H2O2 form 1 mol O2.

Answer

1 mol H2O2 forms 2 mol O2.

Answer

2 mol H2O2 form 2 mol O2.

Answer

2 mol H2O form 2 mol O2.

Question 17

For 4P + 5O2 → 2P2O5, which ratio is mol P to mol P2O5?

Accepted Answer

4 mol P : 2 mol P2O5

Answer

2 mol P : 4 mol P2O5

Answer

5 mol O2 : 2 mol P2O5

Answer

4 mol P : 5 mol O2

Question 18

For BaCl2 + Na2SO4 → BaSO4 + 2NaCl, which factor converts mol BaCl2 to mol NaCl?

Accepted Answer

(2 mol NaCl)/(1 mol BaCl2)

Answer

(1 mol BaCl2)/(2 mol NaCl)

Answer

(1 mol BaSO4)/(1 mol BaCl2)

Answer

(1 mol BaCl2)/(1 mol BaSO4)

Question 19

In Fe2O3 + 3CO → 2Fe + 3CO2, what mole ratio relates Fe2O3 to Fe?

Accepted Answer

1 mol Fe2O3 : 2 mol Fe

Answer

2 mol Fe2O3 : 1 mol Fe

Answer

3 mol Fe2O3 : 2 mol Fe

Answer

1 mol Fe2O3 : 3 mol Fe

Question 20

Which statement is supported by 2AgNO3 + Cu → Cu(NO3)2 + 2Ag?

Accepted Answer

2 mol AgNO3 react with 1 mol Cu.

Answer

1 mol AgNO3 reacts with 2 mol Cu.

Answer

1 mol Cu produces 1 mol Ag.

Answer

2 mol Ag produce 2 mol AgNO3.

Question 21

Given 3Mg + N2 → Mg3N2, what coefficient ratio compares Mg to N2?

Accepted Answer

3 mol Mg : 1 mol N2

Answer

1 mol Mg : 3 mol N2

Answer

3 mol Mg : 1 mol Mg3N2

Answer

1 mol N2 : 1 mol Mg3N2

Question 22

Use 2C4H10 + 13O2 → 8CO2 + 10H2O. Which factor converts mol O2 to mol CO2?

Accepted Answer

(8 mol CO2)/(13 mol O2)

Answer

(13 mol O2)/(8 mol CO2)

Answer

(10 mol H2O)/(13 mol O2)

Answer

(13 mol O2)/(2 mol C4H10)

Question 23

In Zn + 2HCl → ZnCl2 + H2, what is the mole ratio of Zn to H2?

Accepted Answer

1 mol Zn : 1 mol H2

Answer

1 mol Zn : 2 mol H2

Answer

2 mol Zn : 1 mol H2

Answer

2 mol Zn : 2 mol H2

Question 24

Which coefficient statement matches 2Al + 6HCl → 2AlCl3 + 3H2?

Accepted Answer

2 mol Al react with 6 mol HCl.

Answer

6 mol Al react with 2 mol HCl.

Answer

2 mol Al form 6 mol H2.

Answer

3 mol HCl form 2 mol AlCl3.

Question 25

From 2NaN3 → 2Na + 3N2, what is the mol NaN3 to mol N2 coefficient ratio?

Accepted Answer

2 mol NaN3 : 3 mol N2

Answer

3 mol NaN3 : 2 mol N2

Answer

2 mol NaN3 : 2 mol Na

Answer

3 mol N2 : 2 mol Na

Question 26

For CS2 + 3O2 → CO2 + 2SO2, which conversion factor changes mol CS2 to mol SO2?

Accepted Answer

(2 mol SO2)/(1 mol CS2)

Answer

(1 mol CS2)/(2 mol SO2)

Answer

(3 mol O2)/(1 mol CS2)

Answer

(1 mol CO2)/(2 mol SO2)

Question 27

For Pb(NO3)2 + 2KI → PbI2 + 2KNO3, what is Pb(NO3)2 to PbI2?

Accepted Answer

1 mol Pb(NO3)2 : 1 mol PbI2

Answer

1 mol Pb(NO3)2 : 2 mol PbI2

Answer

2 mol Pb(NO3)2 : 1 mol PbI2

Answer

2 mol Pb(NO3)2 : 2 mol PbI2

Question 28

Which statement matches 2Na + 2H2O → 2NaOH + H2?

Accepted Answer

2 mol Na react with 2 mol H2O.

Answer

2 mol Na react with 1 mol H2O.

Answer

1 mol NaOH forms 2 mol H2.

Answer

2 mol H2O produce 2 mol H2.

Question 29

In 6CO2 + 6H2O → C6H12O6 + 6O2, what is the CO2 to O2 coefficient ratio?

Accepted Answer

6 mol CO2 : 6 mol O2

Answer

1 mol CO2 : 6 mol O2

Answer

6 mol CO2 : 1 mol O2

Answer

6 mol H2O : 1 mol C6H12O6

Question 30

For 2H2S + 3O2 → 2SO2 + 2H2O, which factor converts mol H2S to mol O2?

Accepted Answer

(3 mol O2)/(2 mol H2S)

Answer

(2 mol H2S)/(3 mol O2)

Answer

(2 mol SO2)/(2 mol H2S)

Answer

(2 mol H2O)/(3 mol O2)

Question 31

No coefficient appears before Na2CO3 or CaCO3 in Na2CO3 + CaCl2 → CaCO3 + 2NaCl. What is their ratio?

Accepted Answer

1 mol Na2CO3 : 1 mol CaCO3

Answer

1 mol Na2CO3 : 2 mol CaCO3

Answer

2 mol Na2CO3 : 1 mol CaCO3

Answer

2 mol NaCl : 1 mol CaCO3

Question 32

Choose the true coefficient statement for C2H4 + 3O2 → 2CO2 + 2H2O.

Accepted Answer

1 mol C2H4 reacts with 3 mol O2.

Answer

3 mol C2H4 reacts with 1 mol O2.

Answer

1 mol C2H4 forms 3 mol CO2.

Answer

2 mol CO2 reacts with 2 mol H2O.

Question 33

Using 2NO + O2 → 2NO2, what coefficient ratio is mol NO to mol O2?

Accepted Answer

2 mol NO : 1 mol O2

Answer

1 mol NO : 2 mol O2

Answer

2 mol NO : 2 mol NO2

Answer

1 mol O2 : 2 mol NO2

Question 34

For 4Cr + 3O2 → 2Cr2O3, which factor changes mol Cr into mol O2?

Accepted Answer

(3 mol O2)/(4 mol Cr)

Answer

(4 mol Cr)/(3 mol O2)

Answer

(2 mol Cr2O3)/(4 mol Cr)

Answer

(3 mol O2)/(2 mol Cr2O3)

Question 35

Read 2C2H2 + 5O2 → 4CO2 + 2H2O. What is the C2H2 to H2O ratio?

Accepted Answer

2 mol C2H2 : 2 mol H2O

Answer

2 mol C2H2 : 5 mol H2O

Answer

5 mol O2 : 2 mol H2O

Answer

4 mol CO2 : 2 mol H2O

Question 36

For SiCl4 + 2H2O → SiO2 + 4HCl, which factor converts mol H2O to mol HCl?

Accepted Answer

(4 mol HCl)/(2 mol H2O)

Answer

(2 mol H2O)/(4 mol HCl)

Answer

(1 mol SiCl4)/(2 mol H2O)

Answer

(1 mol SiO2)/(4 mol HCl)

Question 37

For 2K + 2H2O → 2KOH + H2, what coefficient ratio compares KOH to H2?

Accepted Answer

2 mol KOH : 1 mol H2

Answer

1 mol KOH : 2 mol H2

Answer

2 mol K : 2 mol H2O

Answer

2 mol H2O : 1 mol H2

Question 38

From 3Cl2 + 2Fe → 2FeCl3, which coefficient ratio is Cl2 to FeCl3?

Accepted Answer

3 mol Cl2 : 2 mol FeCl3

Answer

2 mol Cl2 : 3 mol FeCl3

Answer

3 mol Cl2 : 2 mol Fe

Answer

2 mol Fe : 2 mol FeCl3

Question 39

In 4NH3 + 3O2 → 2N2 + 6H2O, what is the mole ratio of NH3 to H2O?

Accepted Answer

4 mol NH3 : 6 mol H2O

Answer

6 mol NH3 : 4 mol H2O

Answer

4 mol NH3 : 3 mol O2

Answer

2 mol N2 : 6 mol H2O

Question 40

For 2Al(OH)3 → Al2O3 + 3H2O, what ratio gives mol Al(OH)3 to mol H2O?

Accepted Answer

2 mol Al(OH)3 : 3 mol H2O

Answer

3 mol Al(OH)3 : 2 mol H2O

Answer

2 mol Al(OH)3 : 1 mol Al2O3

Answer

1 mol Al2O3 : 3 mol H2O

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The Mole Ratio from a Balanced Equation

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The Mole Ratio from a Balanced Equation

Ways to Play

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Maze Blast

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Board Games: Teacher-led, projected to the class

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BlastRace

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Mystery Blast

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