The formula mass of a covalent compound is also called the molecular mass. The formula mass is the sum of the atomic masses of the atoms in the formula. The electrons have very less mass in comparison with protons or neutrons so the mass of electrons is not influenced in the calculation.
Newtons second law of motion states that force equals mass times acceleration.
Newtons second law of motion states that force equals mass times acceleration. Formula mass is the sum of the masses of the atoms present in the empirical formula. Mass Percentage Formula Mass percent is the mass of the element or solute divided by the mass of the compound or solute. Therefore the formula mass may be correctly referred to as a molecular mass.