Stoichiometry Practice

Acetylene gas C₂H₂ is produced by adding water to calcium carbide, CaC₂.

CaC₂ + 2H₂O → C₂H₂ + Ca(OH)₂

a) How many moles of CaC₂ are needed to react completely with 4 moles of

H₂O?

• 2 mol

• 4 mol

• 1 mol

• 3 mol

1. Acetylene gas C₂H₂ is produced by adding water to calcium carbide, CaC₂.

CaC₂ + 2H₂O → C₂H₂ + Ca(OH)₂

How many grams of acetylene gas are produced by adding water to 5 g of CaC₂?

• 2.63 g

• 0.078 g

• 26 g

• 12.3 g

The combustion of acetylene gas is represented by this equation

2C₂H₂ + 5O₂ → 4CO₂ + 2H₂O

Determine how many grams of O₂ are needed to combust 520 g of C₂H₂ ?

• 1600 g

• 1760 g

• 173056 g

• 169 g

Use the following chemical equation to determine:

3C + 4H₂ → C₃H₈

How many moles of hydrogen gas (H₂) are needed to react with 7.5 moles of solid carbon?

• 10 mol

• 5 mol

• 3.5 mol

• 2 mol

Use the following chemical equation to determine:

3C+ 4H₂ → C₃H₈

How many grams of C₃H₈ would be produced by using 500 grams of Carbon?

• 611.11 g

• 13.88 g

• 41.66 g

• 34.09 g