Question

Mass of methane required to produce 22 g of CO2​ after complete combustion is ______ g.
(Given Molar mass in g mol−1: C=12.0, H=1.0, O=16.0).

Answer 1

CH4 + 2O2 → CO2 + 2H2O

Moles of CO2 produced:

$\frac{22}{44} = 0.5 \, \text{mol}$

Required moles of CH4:

$0.5 \, \text{mol} \times 16 \, \text{g/mol} = 8 \, \text{g}$