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

User Jorsher
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1 Answer

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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.
User Hossein Seifi
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