Calculate the volume that4.0mol of an ideal gas would occupy at 8.0 atmospheres pressure and 1700c (R=8.31mol-1k-1)

Use PV = nRT. If that 1700 c means degrees celsius, don't forget to convert that to kelvin. If you are using 8.31 for R, you must use P in kPa.

1 atmosphere = 101.325 kPa.