The Normal Boiling Point of Pure Benzene Is Found to Be

Multiple Choice

The normal boiling point of pure benzene is found to be 80.10°C.What is the approximate molecular weight of a nonionizing substance if a solution of 3.55 g of the substance dissolved in 100.g of benzene has a normal boiling point of 80.19°C? K_b = 5.12°C/m for benzene,C₆H₆.

A) 20 amu
B) 500 amu
C) 2000 amu
D) 20,000 amu