1.32 Use the data given in the following table to calculate the molar mass of naturally occuring argon isotopes:
|Isotope||Isotopic molar mass||Abundance|
|36Ar||35.96755 g mol-1||
|38Ar||37.96272 g mol-1||
|40Ar||39.9624 g mol-1||
For different isotopes of argon, we have given their naturally occurring abundances.
So, to calculate the molar mass:
Multiply the isotopic molar mass with their abundance to get the molar mass, and then add all of them to get,