Asample of gold (au) has a mass of 72.04 g. a) calculate the number of moles of gold (au) in the sample. show your work

a sample of gold (au) has a mass of 72.04g. calculate the number of atoms of gold (au) in the sample. (use your answer from part a.) show your work

A.  Number of  moles, n = Reacting mass / Molecular mass

                                 n = 72.04/ 196.966

                                 n = 0.366 mole

Hence, the number of moles of gold (Au) in the sample is 0.366 mole

B. the number of atoms of gold (Au) in the sample is expressed as

                                  = 0.366 * 6.03*∧1023

                                   = 2.20698E35 atoms

Explanation: