1.

Calculate thevolume of oxygen and nitrogen present 250 l of air.

Answer»


Solution :Volume percentage of NITROGEN in air is `78%rArr100l`of air contains 78 l of nitrogen
250 l of air contains`(78xx250)/(100)=195`l of nitrogen
Volume percentage of OXYGEN in AIRIS`21%`
`RARR 100` l of air contains 21 l of oxygen
250 lof air contains`(250xx21)/(100)=52.5`lof oxygen.


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