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Solved by Expert Tutors
Question

A solution of 35.7 g of a nonelectrolyte in 220.0 g of chloroform

has a boiling point of 64.5 °C. Assuming ideal solution behavior, what is the molar mass of this compound?
Select the correct answer below:

-1
-2
-4
-3Content attribution
- Opens a dialog
QUESTION 13·4 POINTS
Which molecule will NOT have hydrogen bonding as its strongest type of intermolecular force?
Select the correct answer below:
HF
NH


3
H


2
O
CH


3
F
Sample A
 of water contains 0.75 mol NaCl
 while Sample B
 contains 0.3 mol KBr
 and 0.45 mol NaCl
. Which statement reflects the relationship between the osmotic pressure of the two solutions?
Select the correct answer below:
Solution A>Solution B
Solution A<Solution B
Solution A=Solution B
Cannot be determined.
What is entropy?
Select the correct answer below:
the intermolecular interactions that hold the particles together
the measure of the disorder in a system
the addition of enthalpy changes in the dissolution process
the heat that is released or absorbed during the solvation processWhat is the total amount of heat released in kilojoules when 20.0 g
 water at 50.0

C
 cools to form ice at −50.0

C
? Use the following values for calculations, as needed.
Properties of Water


















Specific Heats(

C)
gas=1.84 J/g

C
liquid=4.184 J/g

C
solid=2.09 J/g

C
Heat of Vaporization
ΔH
vap
=40.7 kJ/mol
Heat of Fusion
ΔH
fus
=6.01 kJ/mol
Use a positive number for your answer.
Provide your answer below:
$$
kJ


FEEDBACK

-

-

-

-
Content attribution
- Opens a dialog
QUESTION 22·4 POINTS
Calculate the freezing point of a solution prepared by dissolving 7.24 g of CaCl
2
 (MM=110.98g
mol


)
 in 175 g of water (MM=g
mol


)
 . K
f
=1.86
o
C
m


Select the correct answer below:

-2.08  $^oC$
-oC​
-- 2.08  $^oC$
-oC​
-0.693  $^oC$
-oC​
--0.693  $^oC$
-oC​Content attribution
- Opens a dialog
QUESTION 23·4 POINTS
Use the periodic table below to answer the question that follows
.At 20

C
, an ideal solution containing 1.75
 moles of a nonvolatile solute and 390.0 g
 of ethanol (C


2
H


5
OH)
 is created. What is the vapor pressure of the solution given that the vapor pressure (in torr) of pure ethanol at this temperature is 43.6 torr
?
Provide your answer be

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Subject: Chemistry, Science

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