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  4. A compound was found to contain nitrogen and oxygen in the ratio 28 g and 80 g respectively. The formula of compound is

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Q. A compound was found to contain nitrogen and oxygen in the ratio $28\, g$ and $80\, g$ respectively. The formula of compound is

Some Basic Concepts of Chemistry

Solution:

No.of nitrogen atoms$ = \frac{Mass in grams}{Atomic wt.} = \frac{28}{14}=2$
No of oxygen atoms$=\frac{Mass in grams}{Atomic wt.}=\frac{80}{16}=5$
$\therefore $ Formula of compound is $N_2O_5$