Question

Based on the following balanced equation:

H2 + O2 à H2O
How many moles of O2 are required to react completely with 2.00 moles of H2

Answer 1

Moles of O₂ are required : 1 mol

Further explanation

Given

2.00 moles of H₂

Required

moles of O₂

Analysis

Balanced equation

Find mol ratio O₂ and H₂

Solution

Balanced equation

2H₂ + O₂ → 2H₂O

From the equation, the mol ratio of H₂ : O₂ = 2 : 1, so mol O₂ :

$\tt \dfrac{1}{2}\times 2=1~mol$