In the preceding problem, if the compound contains `12.8%` nitrogen and `9.8%` sulphur how many nitrogen and sulphur atoms are present per atomof sodium?

Options

A. `2` and `1`
B. `1` and `3`
C. `1` and `2`
D. `3` and `1`

Answer

D

Explanation

`{:(,,"mole","atom"),(,%N=12.8,12.8//14,(12.8)/(14)xxN_(A)),(,%S=9.8,9.8//32,(9.8)/(14)xxN_(A)),(,%Na=7,7//23,(7)/(23)xxN_(A)):}`
`because (7)/(23)xxN_(A)` atom of Na contain
`=(12.8)/(14)xxN_(A)` of `N`
`therefore 1` atom of `Na` contain `=3` atom of `N`
`therefore (7)/(23)xxN_(A)` atom of Na contain `=(9.8)/(32)xxN_(A)` of `S`
`therefore 1` atom of Na contain
`=(9.8)/(32)xx(23)/(7) =1` atom