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Stoichiometry

AP Chemistry· difficulty 3/5

For 2 H₂ + O₂ → 2 H₂O: starting from 8.0 g of H₂, the mass of H₂O produced (excess O₂) is

  • A

    16 g

  • B

    72 g

    check_circle
  • C

    36 g

  • D

    8 g

Explanation

8.0 g / 2 g·mol⁻¹ = 4 mol H₂ → 4 mol H₂O × 18 g/mol = 72 g.

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