1.

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»

Solution :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)` .


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