An Ideal Gas Is at a Temperature Of $30^{\circ} \mathrm{C}$ And a Pressure of 2

An ideal gas is at a temperature of $30^{\circ} \mathrm{C}$ and a pressure of 2.00 atmospheres. What is the number of particles per unit volume of the gas?

A) $6.23 \times 10^{25} \mathrm{~m}^{-3}$
B) $5.98 \times 10^{25} \mathrm{~m}^{-3}$
C) $4.85 \times 10^{25} \mathrm{~m}^{-3}$
D) $5.15 \times 10^{25} \mathrm{~m}^{-3}$
E) $6.02 \times 10^{25} \mathrm{~m}^{-3}$