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If 200 cm^(3) of nitrogen contains 'n' m...

If 200 `cm^(3)` of nitrogen contains 'n' molecules how many molecules of oxygen will be present in `100 cm^(3)` of oxygen, under similar conditions of temperature and pressure.

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200 `cm^(3)` of nitrogen contains .n. molecules
`:. 200 cm^(3)` of oxygen also contains .n. molecules Thus, `1 cm^3` of oxygen will contain
`=n/200` molecules
`100cm^(3)` of oxygen will contain `=n/200xx100` mol
`=n/2` molecules
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