Question

A sample 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 please

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

Answer 1

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

Step-by-step explanation: