For the reaction 2\text{H}2 + \text{O}2 \to 2\text{H}2\text{O}, mixing 4.0 mol H2 with 3.0 mol O2 produces how many mol H2O?

4.0 mol (H2 limiting, 2:2 ratio) H2 needs 2.0 mol O2; we have 3.0 mol so O2 is in excess. H2 limiting → 4.0 mol H2O (2 H2 : 2 H2O ratio).

4.0 mol (H2 limiting, 2:2 ratio)

Stoichiometry

AP Chemistry· difficulty 4/5

2\text{H}_2 + \text{O}_2 \to 2\text{H}_2\text{O}

Explanation

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