# Question #fabcb

##### 1 Answer

Consider a sample of 182 grams of such substance (approximately one mole). It contains:

Given that in a molecule there are integer number of atoms, that equal numbers of moles means equal numbers of atoms, we deduce that in each *molecule* there are:

a) the same number of carbon and oxygen atoms, i.e. 6

b) double number of H atoms, that is 12.

The molecular formula is therefore:

The true molecular mass should be:

A value of 182 deduced from osmosis experiments is just one percent bigger, as due to experimental errors.