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The mass of a single gold atom is 3.27×10-22 grams. How many gold atoms would there be in 70.6 milligrams of gold?
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The mass of a single gold atom is 3.27×10-22 grams. How many gold atoms would there be in 70.6 milligrams of gold?

User Yogman
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1 Answer

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[Total mass of gold atoms] = [Mass of one gold atom] x [number of gold atoms]

divide both sides by mass of one atom:

[Total mass of gold atoms] / [Mass of one gold atom] = [number of gold atoms]

(0.130 grams) / (3.27E-22 grams/atom) = 3.975535168E20 or 397 quintillion gold atoms.

User Rkellerm
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