Stoichiometry and Mole Conversions

Balancing Equations

100

What is the balanced equation for the combustion of methane, CH4?

CH4 + O2 → CO2 + H2O

CH4 + 2O2 → CO2 + 2H2O

200

Balance the equation: C3H8+O2→CO2+H2O

C3H8+5O2→3CO2+4H2O

300

Balance the following equation: Fe+O2→Fe2O3

2Fe+3O2→Fe2O3.

400

What is the coefficient of H2O when balancing C2H6+O2→CO2+H2O?

3

500

Balance the equation for the reaction of aluminum with oxygen: Al+O2→Al2O3.

4Al+3O2→2Al2O3

Grams to Moles

100

How many moles are in 32 g of oxygen gas (O2)?

1 mole O2

200

 Convert 18 g of water (H2O) to moles.

1 mole H2O

300

How many moles are in 100 g of sodium chloride (NaCl)?

1.71 moles NaCl

400

If you have 66g of carbon dioxide (CO2), how many moles do you have?

1.5 moles of CO2

500

Calculate the number of moles in 150g of glucose (C6H12O6).

0.832 moles of Glucose

Moles to Moles

100

If 22 moles of H2 react with 11 mole of O2, how many moles of H2O are produced?

22 moles of H2O

200

In the reaction 2H2+O2→2H2O, how many moles of O2 are needed for 44 moles of H2O?

22 moles of O2

300

How many moles of C2H6 are produced from 33 moles of C3H8 in the reaction C3H8+O2→C2H6+CO2+H2O?

49.5 moles of C2H6 are produced

400

From 24 moles of Al, how many moles of Al2O3 can be produced?

12 moles of Al2O3

500

If 5 moles of NaOH react, how many moles of NaCl are formed in the reaction NaOH+HCl→NaCl+H2O?

5 moles of NaCl are formed

Mole Ratios and Molar Mass

100

What is the molar mass of water (H2O)?

18g/1 mole

200

Determine the mole ratio of N2 to H2 in the reaction N2+3H2→2NH3.

1:3

300

Calculate the molar mass of C6H12O6

180.16 g/mol

400

What is the mole ratio of CaCO3 to CO2 in the reaction CaCO3→CaO+CO2?

1:1

500

If the molar mass of Al is 26.98 g/mol, how many grams are in 3 moles of Al?

80.94 grams Al

Grams to Grams x2 points

100

Convert 10g of H2 to grams of H2O produced in the reaction 2H2+O2→2H2O.

89.35 grams of H2O

200

How many grams of CO2 are produced from 5g of C in the reaction C+O2→CO2?

18.31 grams CO2

300

If 50g of NaCl is used, how many grams of HCl are needed in the reaction Na+HCl→NaCl+H2?

31.18 grams of HCl are needed

400

Calculate the grams of NH3 produced from 34g of N2 in the reaction N2+3H2→2NH3.

41.276 grams of NH3

500

How many grams of C2H6 can be produced from 100 g of C3H8 in the reaction C3H8+O2→C2H6+CO2+H2O?

68.3 grams C2H6