Which statement describes how formula mass and molecular mass differ?
A) A formula mass is measured in atomic mass units, whereas a molecular mass is measured in grams per mole.
B) A formula mass is measured in grams per mole, whereas a molecular mass is measured in atomic mass units.
C) A formula mass is the mass of one formula unit, whereas molecular mass is the mass of one molecule.
D) A formula mass is the mass of one molecule, whereas molecular mass is the mass of one formula unit.
E) There is no difference between these terms.

Question

Quizplus · Accepted Answer

Formula mass refers to the mass of the simplest ratio of ions represented in an ionic compound, essentially the mass of one formula unit of a compound, typically used for ionic compounds. Molecular mass is the mass of a single molecule of a covalently bonded substance, measured in atomic mass units (amu). Both are measured in amu, but they apply to different types of compounds (ionic vs. molecular/covalent).

Which Statement Describes How Formula Mass and Molecular Mass Differ