2. How many moles of Hydrogen gas are needed to produce 4 moles of water? 2 H2(g) + 1 O2(g) → 2 H2O(l)

4 mol H₂

General Formulas and Concepts:

Atomic Structure

Aqueous Solutions

Stoichiometry

Explanation:

Step 1: Define

[RxN - Balanced] 2H₂ (g) + O₂ (g) → 2H₂O (l)

[Given] 4 mol H₂O

[Given] mol H₂

Step 2: Identify Conversions

[RxN] 2 mol H₂ (g) → 2 mol H₂O (l)

Step 3: Stoichiometry

the answer to this question is 3.

a is the correct answer