Question

What do you mean by formula mass?

Answer 1

Hint: We know that the formula mass of a chemical compound in chemistry is defined as the mass of a sample divided by the amount of substance in the sample that is measured in mole. The formula mass of a covalent compound is also called the molecular mass.

Complete answer:
Let us now see the calculation of molar mass and formula mass according to their definitions. Formula mass is defined as the sum of the atomic masses of all the atoms in the formula unit in an ionic crystal. Molar mass of a substance is defined as the quantity of the substance which is equal to the molecular mass in grams.
The formula mass of a molecule is the sum of the atomic weights of the atoms in the empirical formula of the compound. The formula weight) is the sum of the atomic weights of the atoms in the empirical formula of the compound Formula.

Additional information: The formula mass of a substance is the sum of the average atomic masses of each atom represented in the chemical formula and is expressed in atomic mass units. Molar mass is a smallest unit of a compound with one twelfth of the mass of one \[carbon-12\] atoms when we know the number of moles needed for one \[carbon-12\] atoms. When we know the number of moles needed, the concept of molar mass can be used to calculate how many grams of substance are required. The molar mass otherwise known as molecular weight is the sum of the total mass in grams of all the atoms that make up a mole of a molecule. The unit required to measure is grams per mole.

Note:
Remember that the formula mass and the molar mass are one and the same as they are having the different terms but the calculation is based on the same data and definition and therefore will give the same answer.