Which statement describes both homogeneous mixtures and heterogeneous mixtures?

Ibelieve your answer is true 

The molar mass of a substance is defined as the mass of 1 mol of that substance, expressed in grams per mole, and is equal to the mass of 6.022 × 10 23 atoms, molecules, or formula units of that substance.

The answer is false because: gravitational force is independent of medium and depends only on the masses of the two objects and the distance between them