Step-by-step explanation:
Molecular formula of acetone is
and its mass is 58.08 g/mol. Molecular formula of sodium chloride is NaCl and its mass is 58.44 g/mol.
Acetone contains ketone as the functional group and it is acidic in nature. Whereas NaCl is also known as common salt and it is not acidic in nature.
As both acetone and sodium chloride contains different type of atoms. Hence, despite of having similar mass they tend to show different properties.