17. The osmotic pressure of a 0.010 M aqueous solution of potassium sulfate was measured to be 0.660 atm at 25 ℃. What is the van't Hoff factor (i) for this solution? (gas constant R = 0.082 atm L/mol-K)
(A) 0.37
(B) 0.90
(C) 0.98
(D) 2.70
(E) 2.95
答案：D
統計：A:1,B:0,C:0,D:0,E:0
難度：計算中