What mass of carbon dioxide is produced from the complete combustion of 8.40x10-3g of methane

Answer 1

First, write the correctly balanced equation for the combustion of methane (CH₄).

CH₄ + 2O₂ ==> CO₂ + 2H₂O .. balanced equation

Next, use moles of CH₄ combusted, and the mol ratio in the equation to find moles of CO₂, and then convert to grams of CO₂.

molar mass CH₄ = 16 g / mole

molar mass CO₂ = 44 g / mol

8.40x10^-3 g CH₄ x 1 mol CH₄ / 16 g = 5.25x10^-4 mols CH₄

5.25x10^-4 mols CH₄ x 1 mol CO₂ / mol CH₄ x 44 g CO₂ / mol CO₂ = 0.0231 g CO₂