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Stoichiometry

AP Chemistry· difficulty 3/5

Identify the limiting reactant first.

2 H2 + O2 -> 2 H2O 4 mol H2 + 3 mol O2 ? H2O

Maximum mol H2O formed?

  • A

    4 mol

    check_circle
  • B

    3 mol

  • C

    8 mol

  • D

    6 mol

Explanation

H2 needs 2 mol O2 (have 3 - sufficient). O2 needs 8 mol H2 (have only 4). H2 is limiting; 4 mol H2 -> 4 mol H2O.

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