The molar mass of an element in grams is numerically equal to that element's atomic mass in amu.

Question

Quizplus · Accepted Answer

The molar mass of an element (expressed in grams per mole) is numerically equal to its atomic mass (expressed in atomic mass units, amu), because by definition, one mole of a substance contains Avogadro's number (approximately 6.022 x 10^23) of entities (atoms, molecules, etc.), and the atomic mass unit is defined such that the mass of a carbon-12 atom is exactly 12 amu, making the molar mass of carbon-12 exactly 12 grams per mole. This relationship holds for all elements.

The Molar Mass of an Element in Grams Is Numerically