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

g silicon = 0.0243 g

Explanation:

∴ 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

just did the assignment and the answer was #1 +2 n

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