Final answer:
Molar mass is calculated by dividing the sample mass (in grams) by the number of moles. It's expressed as grams per mole and computed by summing atomic masses of elements in a compound's molecular formula.
Step-by-step explanation:
The molar mass is found by dividing the mass of a sample (in grams) by the number of moles in that sample. Molar mass (M) is essentially the mass of 1 mole of a chemical substance and is typically expressed in grams per mole (g/mol). To calculate the molar mass of a compound, one would add the atomic masses of each element present in the molecular formula and express the total in grams per mole.
The unit for molar mass is g.mol⁻¹. For example, when the mass, in grams, of an element is equal to its relative atomic mass, the sample contains one mole of that element, and this mass is termed the molar mass of the element. The molar mass serves as a conversion factor in mole-to-gram calculations within chemical equations.