Phosphine, an Extremely Poisonous and Highly Reactive Gas, Reacts with Oxygen

Multiple Choice

Phosphine, an extremely poisonous and highly reactive gas, reacts with oxygen gas to form tetraphosphorus decaoxide and water. PH₃(g) + O₂(g) → P₄O₁₀(s) + H₂O(g) [unbalanced]
Calculate the mass of P₄O₁₀(s) formed when 225 g of PH₃ reacts with excess oxygen.

A) 1880 g
B) 940. g
C) 900. g
D) 470. g
E) 56.3 g