Determine the Celsius temperature of 2.16 moles of gas contained in a 1.00 L vessel at a pressure of 190. kPa.

Use PV = nRT. Rearrange it to T = PV/nR.

P = 190 kPa

V = 1.00 L

n = 2.16

R = 8.314 kPa*L/mol*k

Plug in and solve. Your answer will be in Kelvin, so subtract 273 to convert it to Celsius. I got - 262 degrees C.