Question

17. A balloon contains 4.50 X 1022 atoms of helium gas. Calculate the mass of helium in grams.

Answer 1

Answer:

1.08 grams

Explanation:

first, we need to find the number of moles

we divide 12.1/22.4=0.54 moles

we multiply the number of moles with the molecular mass 0.54x2=1.08g

Answer 2

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