Atomic mass and molecular mass

Question 1

Atomic mass is and give one example

Answer 1

atomic mass = mass of 1 ATOM of an element
——————————————–
mass of 1 ATOM of an hydrogen

Sodium Na = 23 ( 23 times heavier than 1 atom of Hydrogen )

Question 2

Molecular Mass is …
how does one calculate molecular mass

and an example

Answer 2

Molecular Mass is mass of 1 molecule of a substance compared to mass of 1 atom of hydrogen

because a molecule consists of atoms
molecular mass is the total of the atomic masses

Nitric acid HNO 3 ( small 3 )
atomic mass H =1
atomic mass N =14
atomic mass O =16

1 + 14+ (3X16)
=63