Answer to Question #197696 in General Chemistry for Gabrielle Allen

Question

How manyliters of F, will be

neededto produce 8.32

g of SF;

in the following reaction?

Answer 1

P₄ + 5O₂ = P₄O₁₀  Balanced equation

moles P₄ present = 23.9 g x 1 mole/123.88 g = 0.193 moles

moles O₂ present = 20.8 g x 1 mol/32 g = 0.65 moles O₂

From balanced equation, mole ratio O₂ : P₄ is 5:1. Is 0.65 moles O₂ 5x 0.193 moles? NO. You don't have enough O₂.

O₂ is limiting in this reaction.

 

theoretical moles of P₄O₁₀ = 0.65 moles O₂ x 1 mole P₄O₁₀/5 moles O₂ = 0.13 moles P₄O₁₀

mass of P₄O₁₀ produced = 0.13 moles x 283.9 g = 36.9 g