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14 May, 14:00

What is the mass of 5.40*1021 platinum atoms?

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  1. 14 May, 14:27
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    Moles = 4.81 x 10^21 / 6.02 x 10^23 = 0.00799 Mass = 0.00897009966 mol x 195.08 g/mol = 1.74988704 grams = ~ 1.75 grams
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