Gas Volume Stoichiometry

What is the volume of 51g of NH₃? M_r (NH₃) =17gmol^-1

• 72 dm³

• 0.125 dm³

• 8 dm³

• 53 dm³

• 21 dm³

CO has a volume of 120cm³. What is the mass of this gas? M_r (CO) = 28gmol^-1

• 0.14 g

• 2.1 g

• 140 g

• 105 g

• 0.16 g

Mg + 2H₂O --> Mg(OH)₂ + H₂

What volume of hydrogen will be produced by reacting 67.3 g of magnesium? M_r (Mg) =24.3 gmol^-1

• 66.5 dm³

• 133.5 dm³

• 65.6 dm³

• 113.5 dm³

• 71.5 dm³

Fe₂O_{3 (s)} + 3CO_(g) -> 2Fe _(s) + 3CO_{2 (g)}

Calculate the mass of CO₂ formed from 1.2 dm³ of CO.

• 2.2g

• 1.5g

• 3.6g

• 2.4g

• 1.6g

Mg₃N₂ + 3H₂O ––> 3MgO + 2NH₃

If 10.3 g of magnesium nitride (Mg₃N₂) is used, what volume of ammonia gas would be produced? M_r (Mg₃N₂)= 101gmol^-1

• 5.90 dm³

• 4.90 dm³

• 0.26 dm³

• 0.53 dm³

• 2.71 dm³