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Calculate the mass of 1.23×1024 helium atoms. express your answer in grams of helium.
The mass of atoms of He is 8.16 grams.
According to the mole concept,
6.023 atoms = 1 mole
From the question,
atoms = moles
atoms = 2.04 moles
weight = moles molecular weight
Mass of 2.04 moles of He atoms = 2.04 4
Mass of 2.04 moles of He atoms is 8.16 grams.
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