An Unknown Gas Held in a 25 $\degree$ F Exerts a Pressure of 25 Mtorr

An unknown gas held in a 25.0 mL flask at 45 $\degree$ F exerts a pressure of 25 mtorr.By using this information with the ideal gas law, it is possible to determine

A) the mass of the gas in the container.
B) the identity of the gas in the container.
C) the number of molecules of the gas in the container.
D) the molecular geometry of the gas in the container.
E) nothing more about the gas.