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9 March, 19:50

What is the mass of 5.31*1021 platinum atoms?

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  1. 9 March, 21:59
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    Avogadro's number represents the number of units in one mole of any substance. This has the value of 6.022 x 10^23 units / mole. This number can be used to convert the number of atoms or molecules into number of moles. We calculate as follows:

    5.31*10^21 platinum atoms (1 mol / 6.022 x 10^23 atoms) (78 grams / 1 mol) = 0.6878 grams platinum
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