What mass of carbon dioxide is produced from the complete combustion of 3.00×10−3 g of methane?

Question

Express your answer with the appropriate units.

Answer 1

First, write the correctly balanced equation for the complete combustion of methane:

CH₄ + 2O₂ ==> CO₂ + 2H₂O ... balanced equation for combustion of methane

Next, use the stoichiometry of the balanced equation along with dimensional analysis to find the mass of CO2 produced from 3.00x10^-3 g of methane:

3.00x10^-3 g CH₄ x 1 mol CH₄/16 g x 1 mol CO₂/mol CH₄ x 44 g CO₂/mol CO₂ = 8.25x10^-3 g CO₂