Question

how is molar mass defined? a. the weight of a single atom b. the energy required to start a reaction c. the mass of one mole of a substance, expressed in grams per mole d. the volume occupied by one mole of a gas

Explanation:

Molar mass is a fundamental concept in chemistry. It represents the mass of one mole of a substance and is measured in grams per mole. Option a refers to atomic mass, option b is activation - energy, and option d is molar volume.

Answer:

C. The mass of one mole of a substance, expressed in grams per mole