Question

Please answer either if you can and show work.

Given the reaction ->

P4 + 5O2 → 2P2O5


1. How many moles of P4 would be needed to fully react with 2.5 moles of O2?

2. How many grams of O2 are needed to produce 4 moles of P2O5

Answer 1

Answer: 0.50 mol P₄, 320 g O₂

Step-by-step explanation:

P₄ + 5 O₂ --> 2 P₂O₅

Question 1

Use the balanced equation to help find the number of moles of P₄ needed to react with 2.5 moles of O₂.

2.5 mol O₂ x (1 mol P₄/5 mol O₂) = 0.50 mol P₄

Question 2

Use the balanced equation and molar mass of O₂ to find grams of O₂ needed to produce 4 moles of P₂O₅.

4 mol P₂O₅ x (5 mol O₂/2 mol P₂O₅) x (32.00 g O₂/1 mol O₂) = 320 g O₂