What role does molar mass play in determining the mass of a substance?

Molar mass is crucial in chemistry as it serves as a conversion factor used to relate the number of moles of a substance to its mass. Molar mass is defined as the mass of one mole of a substance, usually expressed in grams per mole (g/mol). When you know the molar mass of a substance, you can determine the mass by multiplying the number of moles of that substance by its molar mass. This relationship is foundational in stoichiometry, allowing chemists to perform calculations involving the quantities of reactants and products in chemical reactions effectively.

Understanding how to use molar mass in this way enables students to easily shift between moles and mass, which is critical for quantitative analysis in chemistry. Therefore, this answer accurately reflects the role of molar mass in determining the mass of a substance.