Stoichiometry

AP Chemistry· difficulty 3/5

For 2 H₂ + O₂ → 2 H₂O: how many grams of water are produced from 16 g of O₂ (M = 32) reacting completely?

  • A

    18 g

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  • B

    36 g

  • C

    32 g

  • D

    9 g

Explanation

16/32 = 0.5 mol O₂ → 1.0 mol H₂O (ratio 1:2). 1.0 × 18 = 18 g.

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