## Chemistry: The Molecular Science (5th Edition)

1 mol $Cl_2$ has the greater mass.
- 1 mol $Cl$ Molar mass ($Cl$) = 35.5 g/mol Therefore, 1 mol $Cl$ = 35.5g - 1 mol $Cl_2$ Molar mass (Cl_2) = 2 * 35.5 = 71g Therefore, 1 mol $Cl_2$ = 71g Since $71g > 35.5g$ The mass in 1 mol $Cl_2$ is greater.