An Ideal Gas Composed of a Mixture of Oxygen and Nitrogen

Multiple Choice

An ideal gas composed of a mixture of oxygen and nitrogen is at a pressure of 1.50 atmospheres and a temperature of 25.0 $^{\circ}$ C.What is the molar density?

A) 79.3 moles/m³
B) 61.3 moles/m³
C) 55.5 moles/m³
D) 47.6 moles/m³
E) 40.0 moles/m³