Answer to Question #62151 in Chemistry for Ali Raza

Question

the mass of an atom of chlorine-35 is 5.807 g and that of an atom of chlorine-37 is 6.139 g. in a typical natural sample of chlorine, 75.77% of the sample is chlorine-35 and 24.23% is chlorine-37. what is the molar mass of a typical sample of chlorine ?

Answer 1

Solution:

The sample of chlorine-35 contains the following number of the moles:

The sample of chlorine-37 also contains 0.1659mol of chlorine-37.
As the percentage of the chlorine-35 and chlorine-37 is given, we can calculate the molar mass of typical sample:

The mass of the typical sample that corresponds to the number of the moles of 0.1659 is:


Answer: 5.8876 g