Question

Calculate the volume of oxygen required for complete combustion of 0.25 moles of methane at STP.

Answer 1

${CH}_4+{2O}_2⟶{CO}_2+{2H}_{2}O$

$1$ mole ${CH}_4$ requires $2\times 22.4L{O}_2$ at STP.

$0.25$ moles ${CH}_4$ $=0.25\times 2\times 22.4$

$=11.2Lor11.2d{m}^3$