3.1.2.1 Relative Atomic Mass And Relative Molecular Mass

Question 1

What is relative atomic mass?

Answer 1

The relative atomic mass, Ar, is the average mass of an atom of an element on a scale where an atom of carbon-12 is exactly 12.

Question 2

What is relative isotopic mass?

Answer 2

Relative isotopic mass is the mass of an atom of an isotope of an element on a scale where an atom is carbon-12 is exactly 12.

Question 3

How to calculate relative atomic mass?

Answer 3

Relative Atomic Mass = (% x Ar) + (% x Ar) / (total %)

Question 4

What is the relative molecular mass?

Answer 4

The relative molecular mass , Mr, is the average mass of a molecule on a scale where an atom of carbon-12 is exactly 12.

Question 5

How to calculate relative molecular mass?

Answer 5

By adding up all the Ar of each element.