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18 February, 05:26

A 12 g sample of P^4O^10 contains how many

molecules of phosphorus pentaoxide?

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Answers (1)
  1. 18 February, 07:26
    0
    molecules P4O10 = 2.546 E22 molecules

    Explanation:

    mol ≡ 6.022 E23 molecules

    ∴ mass P4O10 = 12 g

    ∴ mm P4O10 = 283.886 g/mol

    ⇒ mol P4O10 = (12 g) * (mol/283.886 g) = 0.0423 mol P4O10

    ⇒ molecules P4O10 = (0.0423 mol P4O10) * (6.022 E23 molecules/mol)

    ⇒ molecules P4O10 = 2.546 E22 molecules
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