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Molar mass is the total number of atoms of the element that are compound. One of the easiest yet! All you need are the following:

 

-Calculator

-Periodic Table; and

-Awesome math skills!

 

Step by step:

 

Compute for the molar mass of CH4...

 

1. Identify the number of atoms  present in both elements of the compound

--> C- 1

       H-4

 

2. Find the atomic weight of both elements using the periodic table then multiply it to the no. of atoms. Don't forget to put the unit measure, which is g/mol!

-->C-1 x 12.01 g/mol

      H-4 x 1.01 g/mol

 

3. Add the products then voila! Molar mass is served!

-->12.01 + 4.04= 16.05 g/mole

 

Note: Periodic Tables may vary in the atomic weights of elements so instead of rounding to the nearest hundreths, one may round it to the nearest tens.