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

Correct Answer: 8

CH₄ + 2O₂ → CO₂ + 2H₂O

Moles of CO₂ produced:

\[ \frac{22}{44} = 0.5 \, \text{mol} \]

Required moles of CH₄:

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