What is the expression for the volume of hydrogen gas, in dm³, produced at STP when 0.30 g of magnesium reacts with excess hydrochloric acid solution?

Mg(s) + 2HCl(aq) → MgCl₂(aq) + H₂(g)

Molar volume of an ideal gas at STP = 22.7 dm³\(\,\)mol⁻¹

A.     \(\frac{{0.30 \times 2 \times 22.7}}{{24.31}}\)

B.     \(\frac{{0.30 \times 22.7}}{{24.31}}\)

C.     \(\frac{{0.30 \times 24.31}}{{22.7}}\)

D.     \(\frac{{0.30 \times 22.7}}{{24.31 \times 2}}\)

B