the balanced equation for the combustion of CH₄ is as follows
CH₄ + 2O₂ ---> CO₂ + 2H₂O
stoichiometry of CH₄ to CO₂ is 1:1
therefore molar ratio of CH₄ to CO₂ is 1:1
the number of CH₄ moles combusted - 1.00 mol
number of CO₂ moles formed = number of CH₄ moles reacted
therefore number of CO₂ mol formed - 1.00 mol
mass of CO₂ produced - 1.00 mol x 44 g/mol = 44.0 g
mass of CO₂ produced is 44.0 g