Question #030a2

1 Answer
anor277
Apr 22, 2017

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%=??%

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