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3 November, 18:14

How many grams do 3.6*10^20 atoms of silicon weigh?

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  1. 3 November, 21:43
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    3.6*10^20 atoms * (1 mol / (6.02*10^23 atoms)) = 6.0*10^ (-4) mol.

    6.0*10^ (-4) mol * (28.1 g / 1 mol) = 1.7*10^ (-2) g.

    Note that the units cancel out so you get the answer.

    The final answer is 1.7*10^ (-2) g Si.
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