Answer to Question #105742 in General Chemistry for tiffany

Question

what mass of carbon dioxide gas is formed when 1.56 kg of acetylene is burned in excess oxygen gas?

Answer 1

Acetylene combustion can be described by the following equation:

2C₂H₂ + 5O₂ = 4CO₂ + 2H₂O

According to the reaction:

m(CO₂) = [m(C₂H₂) × 4 × Mr(CO₂)] / [2 × Mr(C₂O₂)

where m - mass, Mr - molecular weight.

From here:

m(CO₂) = [1.56 kg × 4 × 44 g/mol] / [2 × 26 g/mol] = 5.28 kg

Answer: 5.28 kg