What is the molar mass of a substance?

o the mass in grams of one mole of a substance

O the number of particles in one gram of a substance

the number of moles in one gram of a substance

the mass in grams of one particle of a substance

The mass in grams of one mole of a substance

The correct answer is: the mass in grams of one mole of a substance

Explanation:

The molar mass of a given substance corresponds to the mass of one mole of this in grams. Corresponds to a physical property of the substance. Example: the molar mass of water (H20) is:

Molar mass H20 = (Mass H) x 2 + Mass 0 = 2 x 1 g + 16 g = 18 g / mol