Calculate the pressure exerted by ar for a molar volume 0.45 l at 200 k using the van der waals equation of state. the van der waals parameters a and b for ar are 1.355 bar dm mol-2 and 0.0320 dm'mol-1, respectively. write your answer (unit: bar) with 2 decimals, as 12.23. do not add unit to your answer. question 2 based on the calculation in question 1, is repulsive force dominant? choose yes or no yes no question 3 based on the results from questions 1 and 2, calculate the compression factor z. write your answer with two decimals, as 0.66