Question

2b. how many moles of water (h₂o) are produced from 3 moles of oxygen gas (o₂)?
2 h₂ + 1 o₂ → 2 h₂o
(2 points)
3 mol o₂ =

: 1 mol h₂ : 1 mol o₂ : 1 mol h₂o : 1.5 mol h₂o : 2 mol o₂
: 2 mol h₂ : 2 mol h₂o : 3 mol h₂ : 3 mol o₂ : 3 mol h₂o
: 4 mol h₂o : 6 mol h₂o

Explanation:

Step1: Find mole ratio

From reaction: $1\ \text{mol}\ O_2
ightarrow 2\ \text{mol}\ H_2O$, ratio $\frac{2\ \text{mol}\ H_2O}{1\ \text{mol}\ O_2}$

Step2: Calculate moles of $H_2O$

$3\ \text{mol}\ O_2 \times \frac{2\ \text{mol}\ H_2O}{1\ \text{mol}\ O_2} = 6\ \text{mol}\ H_2O$

Answer:

6 mol H₂O