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31 March, 03:41

How many grams do 5 2x 10^20 atoms of silicon weigh? In the units of g.

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  1. 31 March, 03:48
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    g silicon = 0.0243 g

    Explanation:

    1 mol ≡ 6.022 E23 atoms

    ∴ atoms silicon = 5.2 E20 atoms

    ⇒ n Silicon = (5.2 E20 atoms) * (mol/6.022 E23 atoms) = 8.635 E-4 mol silicon

    ∴ mm silicon = 28.086 g/mol

    ⇒ g silicon = (8.635 E-4 mol) * (28.086 g/mol) = 0.0243 g
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