Calculate the weight of $N_2$ in 6.24 litre cylinder at $27^{\large\circ}C$ and 750 mm Hg. (R = 0.0821 litre atm $K^{-1}mol^{-1}$)

Question

$(a)\;4g\qquad(b)\;7g\qquad(c)\;10g\qquad(d)\;12g$