What is meant by the molar mass of a compound?

Answer 1

Molar mass is a technique chemists use to ensure proper mixing of compounds.
For example:
2H2 + O2 = 2H20
It is nearly impossible to do this experiment with 1 molecule of each since they are so small.
You can, however, do it with 2 moles of H2 and 1 mole of O2 in which case a mole is avogadro's number of molecules. In this way chemists can work in grams rather than atomic mass units (amu).

Answer 2

Chemists use a standard number of molecules to compare the masses of various compounds. This standard number of molecules is called a "mole" and is a very large number of molelcules (6.022 x 10^23). The mass (in grams) of this number of molecules is the molar mass. You get it by adding up the individual atomic masses of the elements in a compound.

ex.H2SO4 = (2 x mass H) + (mass S) + (4 x mass O)= 98g/mole

Answer 3

It's the sum of all the atoms' atomic weights.

So, molar mass of water (H2O) is (2 X 1) +16 = 18

Molar mass of glucose (C6H12O6) = (6X12)+(12X1)+(6X16) = 180