Question

Question #030a2

Answer 1

We use the Ideal Gas equation to determine the molar quantity of dinitrogen.................I get approx. `12%`................

Explanation:

`n=(PV)/(RT)=(1*atmxx20.7xx10^-3L)/(0.0821*L*atm*K^-1*mol^-1xx288*K)`

`=8.76xx10^-4*mol` with respect to `"dinitrogen"`.

And, this, in the initial mass of compound, there were `8.76xx10^-4*molxx28.02*g*mol^-1` `=0.0245*g` of nitrogen BY MASS.

And thus...................`"% nitrogen"`.............

`=(0.0245*g)/(0.20*g)xx100%=??%`