Question

The balanced equation for the combustion of Hydrogen is:

2 H2 + O2 → 2H2O


How many moles of H2O will be formed from the complete reaction of 0.750 moles of O2?

0.375 mol
1.50 mol
2.67 mol
0.750 mol

Answer 1

1.5 moles H₂O

General Formulas and Concepts:

Chemistry - Stoichiometry

• Using Dimensional Analysis

Step-by-step explanation:

Step 1: Define

RxN: 2H₂ + O₂ → 2H₂O

Given: 0.750 moles O₂

Step 2: Stoich

`0.750 \ mol \ O_2((2 \ mol \ H_2O)/(1 \ mol \ O_2) )` = 1.5 moles H₂O

Step 3: Check

We are given 3 sig figs.

Since our answer is 2 sig figs, we don't need to round.