Question

What volume of oxygen gas at STP is required to completely burn 12 g of methane (\( \text{CH}_4 \))? (Molar mass of \( \text{CH}_4 = 16 \, \text{g/mol} \), 1 mole of gas at STP occupies \( 22.4 \, \text{L} \)).

• A. \( 11.2 \, \text{L} \)
• B. \( 22.4 \, \text{L} \)
• C. \( 33.6 \, \text{L} \)
• D. \( 44.8 \, \text{L} \)

Hint:

In stoichiometry problems involving gases, use the molar volume at STP (\( 22.4 \, \text{L/mol} \)) to convert moles to volume. Always check the balanced equation to determine the mole ratio.