Tia has a sample of pure gold (Au). She weighed the sample and the result was 35.9 grams. Tia wants to determine the number of atoms in the sample. Calculate the number of atoms in 35.9 g of pure gold.

Question

Chemistry

Sharon

5 July, 12:10

Tia has a sample of pure gold (Au). She weighed the sample and the result was 35.9 grams. Tia wants to determine the number of atoms in the sample. Calculate the number of atoms in 35.9 g of pure gold.

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Krista Mcconnell · Answer 1

First, find moles of gold given the mass of the sample:

(35.9g Au) / (197.0g/mol Au) = 0.182mol Au

Second, multiply moles of Au by Avogrado's number:

(0.182mol) (6.02 x10^23) = 1.10x10^23 atoms Au