A 301g of ethane gas is contained within a 4.860 L container at 27 degrees celcius. What pressure is exerted by this gas if it behaves as described by the van der waals equation of state? for ethane (a = 5.562 and b= 0.06380) A) 10.5 atm B) 12.8 atm C) 15.2 atm D) 17.6 atm