Question

If `""^12C` is used as standard , the relative mass of an atom of sodium is 23 and the relative mass of an atom of phosphorus is 31 . Find the relative masses of a samples of sodium and phosphorus with respect to each other when each contains `3.0 xx 10^(25)` atoms .

Answer 1

The relative masses of samples that contain equal numbers of atoms will be the same as the relative masses of individual atoms , thus ,
`("mass of the sample of sodium")/("mass of the sample of phosphorus") = (23)/(31)` .