1250 cc of oxygen was burnt with 300 cc of ethane [C₂H₆]. Calculate the volume of unused oxygen and the volume of carbon dioxide formed:

2C₂H₆ + 7O₂ ⟶ 4CO₂ + 6H₂O

What volume of oxygen at STP is required to affect the combustion of 11 litres of ethylene [C₂H₄] at 273°C and 380 mm of Hg pressure?

C₂H₄ + 3O₂ ⟶ 2CO₂ + 2H₂O

What volume of propane is burnt for every 500 cm³ of air used in the reaction under the same conditions? (assuming oxygen is 1/5th of air)

C₃H₈ + 5O₂ ⟶ 3CO₂ + 4H₂O

450 cm³ of nitrogen monoxide and 200 cm³ of oxygen are mixed together and ignited. Calculate the composition of the resulting mixture.

2NO + O₂ ⟶ 2NO₂