need help on this question, dont understand it.

Question

A 15 litre cylinder contains 0.35kg of butane gas (C4 H10). Assuming ideal gas behaviour, calculate the pressure of the gas if the cylinder is stored at 50 Fahrenheit.

Answer 1

PV=nRT      Pressure, Volume   n=the number of moles of the gas (calculate using its weight and molar mass--watch grams and kg)

                  R=Univ Gas Constant    T=Temperature

 

So: P=nRT/V

 

Watch the units! liters,atm,moles   The units for "R" are tricky but we have to use the same units for the values in the rest of the problem as are used for "R".   Temp of 50F needs converting to C.

 

If all the units are proper just plug in the numbers