Calculate the mass of 1.23×1024 helium atoms. express your answer in grams of helium.

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Question:

Calculate the mass of 1.23×1024 helium atoms. express your answer in grams of helium.

Answer:

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

Mole =

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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