20° C is 185 torr. When 1.2 g of a non volatile substance was dissolved in 100 g of acetone at 20° C its vapour pressure was 183 torr. The molar mass of the substance is
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dm-3 sucrose solution at 20 ° C (molar gas constant, R = 8.314 JK -1 mol -1 ; 1 dm-3 = 0.001 m3 ) a. 4870 Pa b. 4.87 Pa c. 0.00487 Pa d. 0.33 Pa Ans. a (17)
