A 2.0 mg droplet of liquid nitrogen is present in a 30 mL tube as it is sealed off at very low temperature. What will be the nitrogen pressure in the tube when it is warmed to 20°C? Express your answer in atmospheres. (M for nitrogen is 28 kg/K mol).
(a) 0.057 atm
(b) 0.57 atm
(c) 5.7 atm
(d) 0.0057 atm