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12-07-2017
Chemistry

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. What is the mass, in grams, of a sample of 7.83 × 1024 atoms of helium (He)?

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zrh2sfo zrh2sfo

25-07-2017

moles He = 7.83 x 10^24 / 6.02 x 10^23 =13.0

mass He = 13.0 mol x 4.00 g/mol = 52.0 g

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