The Total solution for NCERT class 6-12
Use the data given in the following table tocalculate the molar mass of naturally occurring argon isotopes:
Isotope
Isotopic molar mass
Abundance
36Ar
35.96755 gmol–1
0.337%
38Ar
37.96272 gmol–1
0.063%
40Ar
39.9624 gmol–1
99.600%
Molar mass of argon
= 39.947 gmol–1