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ACS Gen Chem 2 Final Exam Study Guide with Complete Solutions

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ACS Gen Chem 2 Final Exam Study Guide with Complete Solutions C - ️️ Correct-Where is the hydrophilic (attracted to water) region of the molecule? (A) Region 1 (B) Region 2 (C) Region 3 (D) The three regions are equally hydrophilic C - ️️ Correct-Which molecule is most soluble in wat...

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  • September 25, 2024
  • 22
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • ACS Chemistry
  • ACS Chemistry
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TITLE: EMILLYCHARLOTTE 2024/2025 ACADEMIC PERIOD
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ACS Gen Chem 2 Final Exam Study
Guide with Complete Solutions
C - ✔️✔️Correct-Where is the hydrophilic (attracted to water) region of the molecule?


(A) Region 1

(B) Region 2

(C) Region 3

(D) The three regions are equally hydrophilic

C - ✔️✔️Correct-Which molecule is most soluble in water?

D - ✔️✔️Correct-A solution of NaCl in water has a concentration of 20.5% by mass. What

is the molal concentration of the solution?



Molar Mass NaCl = 58.44 g/mol



(A) 0.205 m

(B) 0.258 m

(C) 3.51 m

(D) 4.41 m

B - ✔️✔️Correct-What is the mole fraction of water in 200 g of 89% (by mass) ethanol,

C2H5OH?


1/22

,TITLE: EMILLYCHARLOTTE 2024/2025 ACADEMIC PERIOD
OWNER: EMILLYCHARLOTTE
COPYRIGHT STATEMENT: ©2024 EMILLYCHARLOTTE. ALL RIGHTS RESERVED
FIRST PUBLISHED: SEPTEMBER 2024



Molar Mass C2H3OH = 46 g/mol



(A) 0.11

(B) 0.24

(C) 0.32

(D) 0.76

D - ✔️✔️Correct-A mixture of 100 g of K2Cr2O7 and 200 g of water is stirred at 60

degrees C until no more of the salt dissolves. The resulting solution is poured off into a

separate beaker, leaving the undissolved solid behind. The solution is now colled to 20

degrees C. What mass of K2Cr2O7 crystallizes from the solution during the cooling?



(A) 9 g

(B) 18 g

(C) 31 g

(D) 62 g

A - ✔️✔️Correct-Carbonated beverages have a fizz because of gas dissolved in the

solution. What increases the concentration of gas in a solution?

(A) cooling the solution

(B) heating the solution

(C) increasing the volume of solution


2/22

, TITLE: EMILLYCHARLOTTE 2024/2025 ACADEMIC PERIOD
OWNER: EMILLYCHARLOTTE
COPYRIGHT STATEMENT: ©2024 EMILLYCHARLOTTE. ALL RIGHTS RESERVED
FIRST PUBLISHED: SEPTEMBER 2024
(D) decreasing the volume of solution

D - ✔️✔️Correct-When 100 g of an unknown compound was dissolved in 1.00 kg of

water, the freezing point was lowered by 6.36 degrees C. What is the identity of this

unknown compound?



Kf for water = 1.86 degrees C/m



(A) CsCl

(B) KCl

(C) LiF

(D) NaCl

A - ✔️✔️Correct-Which 0.1 molal aqueous solution will have the lowest freezing point?

(A) Al(NO3)3

(B) CaCl2

(C) C2H5OH

(D) NaCl

B - ✔️✔️Correct-What is the rate law of this reaction?

2H2 (g) + 2NO (g) --> N2 (g) + 2H2O (g)



(A) rate = k[H2]^2 [NO]

(B) rate = k[H2] [NO]^2


3/22

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