Answer :

Space

Answer:

4 mol H₂

General Formulas and Concepts:

Atomic Structure

  • Reading a Periodic Table
  • Moles

Aqueous Solutions

  • States of matter

Stoichiometry

  • Using Dimensional Analysis
  • Analyzing reactions RxN

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

  1. [DA] Set up conversion:                                                                                   [tex]\displaystyle 4 \ mol \ H_2O(\frac{2 \ mol \ H_2}{2 \ mol \ H_2O})[/tex]
  2. [DA] Multiply [Cancel out units]:                                                                      [tex]\displaystyle 4 \ mol \ H_2[/tex]

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