Posted by Sarah on .
The compound CH3F has van der Waals constants a = 5.009 atm•L2
/mol
2
and b = 0.0562 L/mol.
Using both the ideal gas law and van der Waals’s equation, calculate the pressure expected for 25 mol of
CH3F gas in a 5.00L container at 75 °C.
no idea how to even start this one...

Chemistry 
DrBob222,
Of course you do. Look in your text, find the van der waals equation, substitute the numbers and solve for P.
Then in a separate calculate, use PV = nRT and calculate P.
Post your work if you get stuck. This just some algebra to go through.