Chemistry help please?

Question

why is the simplest formula used to determine the molar mass for ionic compounds?

Answer 1

What do you mean by the simplest? The thing is that for molar mass you need to have the number of atoms of one element in a molecule (so like how many atoms of oxygen are in H2O - one, right?) So, if we were to calculate the molar mass of H2O, it would be:

2 * H + 1 x*O = 2 * 1 + 1 * 16 = 18 g/mol

(1 and 16 are the atomic masses of H and O respectively)

Molar mass is important for chemical reactions and stuff. Hope this helps...

Answer 2

Why ? Because its easy.