Question

There are 6.02 * 10^23 atoms of whatever in a mole. Xenon has a molar mass of 131.29 g/mole. How many atoms of xenon are in a sample that has a mass of 83.7 grams?

Answer 1

The number of atoms in the sample that has a mass of 83.7 grams of Xenon is 3.84×10²³ atoms

Avogadro's hypothesis

1 mole of Xenon = 6.02×10²³ atoms

But

1 mole of Xenon = 131.29 g

Thus, we can say that:

131.29 g of Xenon = 6.02×10²³ atoms

How to determine the number of atoms in 83.7 g of the sample

The number of atoms in 83.7 g of the sample can be obtained as illustrated below:

131.29 g of Xenon = 6.02×10²³ atoms

Therefore,

83.7 g of Xenon = (83.7 × 6.02×10²³) / 131.29

83.7 g of Xenon = 3.84×10²³ atoms

Thus, 83.7 g of the sample contains 3.84×10²³ atoms

Learn more about Avogadro's number:

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