What is the relationship between the molecular mass and the molar mass of a substance?

The molar mass of a substance is the mass (in grams per mole) of 6.022 x atoms, molecules, or formula units of that substance.

Explanation:

In each case, the number of grams in 1 mol is the same as the number of atomic mass units that describe the atomic mass, the molecular mass, or the formula mass, respectively.

1 a

2 d

3 a

4 c

explanation:

that's what i got you can count the number of atoms