Question

Explain the.Formula mass with an example​

Answer 1

The formula mass of a molecule (also known as formula weight) is the sum of the atomic weights of the atoms in the empirical formula of the compound. Formula weight is given in atomic mass units (amu♧♧

Answer 2

Answer:

The formula mass of a substance is the sum of atomic masses of the atoms present in the formula

Explanation:

a term of formula mass is used for such ionic compounds instead of molecular  

mass

Example of formula mass

1 . NaCl

= average atomic mass of Na + average atomic mass of Cl

= 23.0 u + 35.5 u

= 58.5 u