General Chemistry 1 (CHEM1141)Shawnee State University — Fall 2016

September 23, 2016

E x a m # I CName

Please write your full name, and the exam version (IC) that you have on the scantron sheet!

Please 0 check the box next to your correct section number.

Section #: □ l. (Monday Lab, 11:00 AM - 1:50 PM) □ 2. (Wednesday Lab, 11:00 AM - 1:50 PM)

□ 3. (Tuesday Lab, 3:30 PM - 6:20 PM) n 4. (Thursday Lab, 3:30 PM - 6:20 PM)

□ 5. (Wednesday Lab, 2:00 PM - 4:50 PM)

Multiple Choice:

Q l l :

Q 1 2 :

Q13:

Q14:

Q15:

Q16:

Q17:

B O N U S :

T O T A L :

/ 3 0

/ l O

/ l O

n o

n o

n o

n o

n o

_ /3

n o o

Each problem in this section (multiple choice) is worth 3 points !

Ql. In one of the first lab experiments this semester you determined the mass of your graduatedcylinder containing water three times. One CHEM 1141 student obtained the followingmasses: 34.987 g, 35.001 g, and 34.995 g. This students are certainly .

^c:;—-clow Idcj^IwA) accurate (^B) precise^^ C) accurate and preciseabttJ" CCw ofa / tttdvJ 'f/ yjalnf

D) accurate but not precise E) neither accurate nor precise

02. Which of the followine represents the smallest volume of water ?O-OOOIIL .4c..iU!^ = o.0.<C

(g>.5 X 10"'kL

o ' O o t s L3 Oo\5Lc^ QI.SxIQ-^L

D) 1.5 X iQ nL

l'6y'oV l o ^ O ' l ^ U

B) 15 cm

E) 1.5 X 10^nL l-^t.

[•Srio' ^jCL\ (o^ 1 - i.'=;xfO ' L10'

y \

= ( - ^ L

Q3. Read the volume of water contained in the 100 mL graduated cylinder shown below to thecorrect number of significant figures.

2 L ,

2 ^

3 0

2 0

1 0

(-<ai

>\ j \ \ i V v s o ® " ) L .

A ) 2 0 . 5 m L B ) 2 2 . 5 3 m L C ) 2 5 . 5 3 m L 2 5 . 5 m L E ) 2 5 m L

Q4. The density of gold is 19.3 . This is an example of 2i(n)\

A) chemical property B) physical property C) intensive property

D) extensive property Eboth B and C8 Sv,

68 n'

Q5. A commoaiy^-oflering isotope of tin is tin-118, while most oxygen occurs in nature asoxygen-C^ A formula unit of tin(IV) oxide formed from these isotopes would contain howm a n y n e u t r o n s ? 0 ^ ~ "

A) 66 O ) 8 ^ C) 76 D) 134 E) 150

Q6. How many significant figures are in the measurement 3.300 x 10'* kg contain.

A ) 1 B) 2 C) 3 E ) 5

Q7. Which of the following symbols represent isotopes of the same element ?

' ' X ^ 2 ) l l X 3 )' ' f

C) 1 and 4 D) 3 and 4

1)

A) 1 and 2

4)

B) )1 and 3 E) 1, 2, and 3

Q8. The Rutherford gold-foil scattering experiment provided evidence for;

A) the existence of isotopes B) the electron cloud about the atom

the nuclear model of the atom D) the law of multiple proportions

E) the mass to charge ratio of the electron

MOf NJi^r s"^'Q9. The formulas for nitrate, nitrite, and sulfide ions are represented, respectively, as:

A) NO4", NO3", so/- B) NO3- S'- C) NO2- NO3- SO3'"

D) N^", NO'-, SO3'- NO3- NOj- S'-

C),

QIO. A prospector found a grey colored metal nugget and wants to see if it is valuable. Yoursuggestion is to determine the density by obtaining the mass and volume of the nugget. Themass of the nugget was obtained by difference as follows;

weigh pan + nugget = 25.915 g ^> a

e m p t y w e i g h p a n - 1 . 7 5 3 g _ _

Since this nugget is an irregularly shaped object, the volume of the nugget was determinedby placing it in a graduated cylinder containing water as follows:

graduated cylinder + water + nugget = 18.45 mL v ^

graduated cylinder + water = 9.50 mL

The density (and identity) of the nugget is: 24-

2.70 ^ (aluminum) B) 7.87 ^ (iron) C) 11.4 ^ (lead)

D) 10 .5 ( s i l ve r )m L E) 7.13 (zinc)

Each problem in this section (short answer) is worth 10 points !

All work must be show in order to receive credit!

You must use the factor-label (conversion-factor) method for all conversions !

Be sure to include units where applicable !

All numeric answers must be rounded to the correct number of significant figures !

Qll. Provide the correct name for each of the following compounds:

A) Li2S04

B) CUNO2 CoppgrCi")C) BrjOg Lfi b^TSYviiA^ r\6V\oxi(jj?D) Na3P04 • 4 H2O

E) CF4 Caciy(S i c JltAoridp[ £ a Kv/l

o

F) NH4NO3 QjiMV^5YA(^(/lA

G) H3PO4 (dissolved in water) _ nnos CXCyC^

Q12. Complete the following table:

-firCWN

Isotope Symbol ( zX-^58 p 3+

I o n N a m e if5v\6n cUori'XlAtomic Number (Z) 2,(0 1 7

Mass Number (A) 5 S 5 5

N u m b e r o f P r o t o n s \ 1N u m b e r o f E l e c t r o n s 23) 2 0

N u m b e r o f N e u t r o n s 3 ^ 1 8

3> MOt {vvow 4l"p•-) cUor^^

Q13. A barrel of oil as measured on the oil market is equal to 1.333 U.S. barrels. A U.S. barrel isequal to 31.5 gallons. If oil is on the market at $ 94.0 per barrel, what is the price in dollarsper gallon ?

^ f t v - O ^ I' \ . W § 1 - 5 3 U

Q14. Provide the correct chemical formula for each of the following compounds:

A) iron(III) sulfide €. 2 3E) dibromine heptachloride

C) sodium phosphide

D) magnesium bicarbonate

E) potassium chromate C9 C/Qy-fCo CrOv-i-

Q15. Fill in the blanks:

A) The name of the group IIA elements on the periodic table: Aibl 'AJL "R kutaX?B) The name of an element in the fifth period on the periodic table: ^ '

C) The name of the group VIIIA elements on the periodic table: NpUg/lrtg/'V GoA</iD) The name of a metalloid on the periodic table: ) —

E) The name of a transition metal on the periodic table:

Q16. Complete the following calculations and round your answers to the correct number ofsignificant figures:

A )

B )

D)

3 6 5 . 0 7 9 - 4 3 . 2 0

7 . 2 8 4 9 + 5 . 0 3 0

8 9 . 7 - 2 . 0 42a f

C) 6.307 + 9.0745 + 12.83f 2dp

8 . 0 0 1 5 k m X 4 . 8 0 6 k m

3 . 0 8 k m

E) 0.0073590 x 0.08070S s i UrS,-.

Sa i -88

SI* (3(3 0 - 1 ^ 0 ( I f .^ '•'P

2 8 . 2 \

z - 5 kI "

O oooS'={ '\ (" 4

Q17. Mercury has a density of 13.56 m LWhat volume in milliliters (mL) does 248.0 g of

3 • *mercury occupy ? Convert this volume into cubic inches (in ) given that 1 m = 2.54 cm.

= > ( 6 - 2 < = 1 « L

( (lA \ - |. I 1 fcv

3 Point Bonus QuestionA 6 < 5 6 6 6 6 6 6 6 6 - 5 6 6 d > 6 6 6 6 6 6 6 a 6 6 6 < 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6

Name all seven elements that form diatomic molecules in their natural state*

civlon'"0,t><W , loji^ A\Trtic , f u Of JAJI