Question

2 h₂ + o₂ → 2 h₂o

1. given 5 moles of o₂, how many moles of h₂o are produced?
2. given 0.32 moles of h₂o, how many moles of h₂ are needed?
3. given 2.55 moles of h₂, how many moles of h₂o are produced?

Explanation:

Step1: Analyze the stoichiometric ratio

From the balanced equation \(2H_2 + O_2
ightarrow2H_2O\), the ratio of \(O_2\) to \(H_2O\) is \(1:2\), \(H_2\) to \(H_2O\) is \(1:1\).

Step2: Solve for each question

Question 1

Given \(n_{O_2}=5\space mol\). Using the ratio \(n_{H_2O}=2\times n_{O_2}\), so \(n_{H_2O}=2\times5 = 10\space mol\).

Question 2

Given \(n_{H_2O}=0.32\space mol\). Using the ratio \(n_{H_2}=n_{H_2O}\), so \(n_{H_2}=0.32\space mol\).

Question 3

Given \(n_{H_2}=2.55\space mol\). Using the ratio \(n_{H_2O}=n_{H_2}\), so \(n_{H_2O}=2.55\space mol\).

Answer:

1. \(10\space mol\)
2. \(0.32\space mol\)
3. \(2.55\space mol\)