A 2.00-L flask is filled with propane gas (C3H8) at a pressure of 1.00 atm and a temperature of -15.0°C. Calculate the moles of the propane in the flask?

Answer 1

Use PV = nRT. Substitute the numbers and solve for n
Remember to use kelvin for temperature. K = 273 + C= 273 + (-15.0) = ?