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(Last name)

(First name)

CHEM 116

Print Name: ______________________│________________│

Date: 02/09 /2022

Instructor: Dr
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Section #: ________________
Assigned Seat #___________

EXAM 1A
DIRECTIONS
• Put away your electronic devices (cell phone, smart watches, ear
phones, etc), if you a re caught using any elect ronic dev ices during the
exam, you will be asked to leave the roo m and receive a ZERO fo r the
exam!!!
• Please leave your photo ID on your desk
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1
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2
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You may carefully remove this last page, if you
choose, but do not open the staple
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Part A: has 14 multiple choice questions for a total of 70 points
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Therefore, leave no question
unanswered, even if you simply must guess
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Show all work; show how the units cancel to give the final units on your answer,
and report your answer to the proper number of significant figures, rounding properly as you
do so
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HONOR CODE STATEMENT: On my honor I pledge that I have not violated the provisions of
the Rutgers student honor code
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PLEASE PUT YOUR ANSWER ON THE SCANTRON PAPER!
PART A is ONLY graded through scantron!!!!

1
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0 atm
over the liquid at 25 °C is 1
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The Henry's law constant for CO2 at this
temperature is ________
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0 × 10-2 mol/L-atm
B) 4
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6 × 10-3 mol/L-atm
D) 2
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2
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A
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C
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E
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In general, the solubility of a gas in water decreases with increasing temperature
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A solution containing less than the equilibrium amount is called an unsaturated solution
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3
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B
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D
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CCl4 and NH3
H2O and CH3CHO
HBr and CCl4
CH3OH and CH3CH2CH2CH2CH3
Br2 and HI

4
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When sodium chloride dissolves in water, how do the water molecules orient around the
ions?
A
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B
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C
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D
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E
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6
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1
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2
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3
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4
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5
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6
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A
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Only 1, 3, 6
C
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Only 2, 4
E
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Place the following compounds in order of decreasing strength of intermolecular forces
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Which one of the liquids would you expect to have the lowest vapor pressure at room
temperature?
A) water, H2O
B) methanol, CH3OH
C) ethanol, CH3CH2OH
D) diethyl ether, CH3OH2–O–CH2CH3
E) ethylene glycol, HO–CH2–CH2–OH

9
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d
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e
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10
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0
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-0
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51
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-51
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-6218 kJ/mol

11
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Which of the following statements is False?

A
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C
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The triple point of this substance occurs at a temperature of 114°C
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Line AC is where solid and liquid are in equilibrium
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E
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13
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A) (CH3)3N
B) H2O
C) CH3OH
D) HF
E) CH3NH2
14
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What is the edge length of the unit cell
if the atomic radius of gold is 144 pm?
A) 204 pm
B) 288 pm
C) 333 pm
D) 407 pm
E) 72 pm

Part B: Short answer questions, the total is 35 points
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15
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4 pm
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423 g/mol
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(Report 4 sig fig for the final answer)

16
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0 g H2O from a liquid at 65°C to a gas
at 115°C? The following physical data may be useful
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7 kJ/mol
ΔHfus = 6
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18 J/g∘C
Cgas = 2
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09 J/g∘C
Tmelting = 0∘C
Tboiling = 100∘C

17
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8°C, whose normal
boiling point is 68
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7 kJ/mol
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(a) (5 pts) What mass (in g) of NH3 must be dissolved in 475 g of methanol to make a 0
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0 g of NH3 in 250
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The density of
the resulting solution is 0
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The molarity of NH3 in the solution is ________ M

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