A mixture of \(N_{2}\) and \(A r\) gases in a cylinder contains \(7 g\) of \(N_{2}\) and \(8 g\) of \(A r\). If the total pressure of the mixture of the gases in the cylinder is 27 bar, the partial pressure of \(N_{2}\) is:
[Use atomic masses (in g \(\mathrm{mol}^{-1}\) ) : \(N=14, A r=40\) ]
A 9 bar
B 12 bar
(c) \(15 \mathrm{bar}\)
D \(18 \mathrm{bar}\)