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A Solution Is Prepared by Dissolving 21 C3\mathrm { C } _ { 3 }

Question 153

Multiple Choice

A solution is prepared by dissolving 21.0 g of glycerin ( C3\mathrm { C } _ { 3 } Hg\mathrm { Hg } O3\mathrm { O } _ { 3 } ) in 201 g of ethanol (C2H5OH) \left( \mathrm { C } _ { 2 } \mathrm { H } _ { 5 } \mathrm { OH } \right) The freezing point of the solution is ________°C.The freezing point of pure ethanol is 114.6C- 114.6 ^ { \circ } \mathrm { C } .The molal freezing point depression constant ( KfK_f ) for ethanol is 1.99Cm11.99 ^ { \circ } \mathrm { Cm } ^ { - 1 } The molar masses of glycerin and of ethanol are 92.1 g mol-1 and 46.1 g mol-1,respectively.


A) -112.8
B) -116.4
C) 2.26
D) -112.3
E) -116.9

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