Author Question: The freezing point of pure benzene was measured as 5.49 C. With the same benzene and the same ... (Read 148 times)

vHAUNG6011 · **on:** Jul 8, 2021

Question 1

The freezing point of a solution made by dissolving 8.9 g of MgCl₂ in 98 g H₂O is -4.3 °C. K_f for water is 1.86 °C m^-1. The van't Hoff i factor for this solution is ________.
◦ 1.2
◦ 2.7
◦ 2.4
◦ 2.0
◦ 3.0

Question 2

The freezing point of pure benzene was measured as 5.49 °C. With the same benzene and the same equipment, the freezing point of a solution containing 6.60 g of an unknown molecular compound in 140 g of benzene was found to be 2.35 °C. The cryoscopic constant, K_f, for benzene is 5.12 °C kg/mol. Calculate the mole weight of the unknown.
◦ 103 g/mol
◦ 76.9 g/mol
◦ 44.0 g/mol
◦ 28.9 g/mol
◦ 17.4 g/mol

Liamb2179 · **Reply #1 on:** Jul 8, 2021

A FREE account is required to view all solutions!

Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.

Answer Preview

Only 29% of students answer this correctly