Phosphine, PH₃, a Reactive and Poisonous Compound, Reacts with Oxygen

Multiple Choice

Phosphine, PH₃, a reactive and poisonous compound, reacts with oxygen as follows: 4PH₃(g) + 8O₂(g) → P₄O₁₀(s) + 6H₂O(g) If you need to make 6.5 moles of P₄O₁₀, how many moles of PH₃ is required for the reaction?

A) 6.5 moles
B) 13 moles
C) 26 moles
D) 3.2 moles
E) 1.6 moles