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9 November, 20:38

How many atoms are in a sample of carbon weighing 16 grams? Round your answer to two decimal places.

Group of answer choices

9.63 x 10^24 atoms

1.33 atoms

2.20 x 10^22 atoms

8.01 x 10^23 atoms

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Answers (1)
  1. 10 November, 00:23
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    d) 8.01 E23 atoms

    Explanation:

    mol ≡ 6.022 E23 atoms

    ∴ mass C = 16 g

    ∴ molar mass C = 12.0107 g/mol

    ⇒ mol C = (16 g) * (mol/12.0107 g) = 1.332 mol

    ⇒ atoms C = (1.332 mol) * (6.022 E23 atoms/mol)

    ⇒ atoms C = 8.02 E23 atoms
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