[单选题]
Two liters of a perfecm wkvzr(n58 y8ui e8y.kt;7uw t gas are )wz0 z5fxx5v2 w,p6a)l8os8eajf.l* iscq ex at $0 \; ^{\circ}C$ and 1 atm. If the gas is nitrogen, $N_2$, determine the mass of the gas.
A. $2.5 \; g$
B. $2.7 \; g$
C. $2.9 \; g$
D. $3.1 \; g$
