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What is the mass of 5.35×1021 platinum atoms?

What is the mass of 5.35×1021 platinum atoms?
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What is the mass of 5.35×1021 platinum atoms?

User Reimond Hill
by
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1 Answer

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Atomic weight of a Platinum:
195.078 u = 195.078 * 1.66 * 10^(-27) kg = 3.2382948 * 10^(-25) kg
m ( Pt ) = 3.2382948 * 10^(-25) * 5.35 * 10^(21) =
= 1.732488 * 10^(-3) kg = 1.732448 g
User Shaqueen
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