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18 February, 13:07

What is the mass of 5.05*1021 platinum atoms?

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  1. 18 February, 15:39
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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:

    5.05*10^21 atoms Pt (1 mol / 6.022 x 10^23 atoms) (195.084 g / 1 mol) = 1.64 g Pt
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