How Many Molecules of N₂ Are in a 400

Multiple Choice

How many molecules of N₂ are in a 400.0 mL container at 780 mm Hg and 135°C?

A) 7) 01 × 10^{21 molecules}
B) 7) 38 × 10^{21 molecules}
C) 2) 12 × 10^{22 molecules}
D) 2) 23 × 10^{22 molecules}