Question

give the expression of relative atomic mass and relative molecular mass​

Answer 1

Answer:

To calculate the expression of relative atomic mass and relative molecular masses, you need to consider the mass of each individual atoms in the molecules of the element.

Explanation:

Relative Atomic Mass

The mass of an atom can be calculated as 1/12 as compared to C-12 mass of an atom. When using this formulation, it is obvious that fraction mass of electron of an atom is neglected. At this, the mass of proton as well as mass of neutron of the same atom is considered.

So when calculating relative atomic mass, you need to consider isotopic proportion of an element and its relative isotopic mass.

Relative Molecular mass

This is also calculated as the sum of all masses of an atoms involved in the given element formulae. When calculating the molecular mass you have to add the sum of all atoms of each elements mentioned in the molecular formulae of the element.