Tia has a sample of pure gold (Au). She weighed the sample and the result was 59.3 grams. Tia wants to determine the number of atoms in the sample. Calculate the

Question

Tia has a sample of pure gold (Au). She weighed the sample and the result was 59.3 grams. Tia wants to determine the number of atoms in the sample. Calculate the number of atoms in 59.3 g of pure gold.

Answer 1

Sample weight = 59.3 g

1 mole of Au = 106.96657 g

# of moles in sample = 59.3 / 106.96657 = 0.301 moles

1 mole of Au = 6.02 x 10^23 atoms.

0.301 * 6.02 x 10^23 atoms =

1.812 x 10^23 atoms in the sample