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CHEMISTRY 1211
NAME_________________
EXAM IA
Fall, 2014
Kirberger
All notes, books, etc., must be placed out of sight. Please read each of the problems carefully. If
something is not clear, please ask.
The exam is worth a total of 108 points. Make sure your exam is complete. A periodic table is
attached as the last sheet on the exam.
Answers should be placed in the space provided. Write legibly--if I cannot read it--it is wrong.
Please include an explanation whenever asked to or whenever necessary to make your answer
clear. Please put your name on every page of the exam.
Please note that you may not leave the room for any reason once you have started the exam. If
you have to leave early, you must submit your exam before you leave. You will not be allowed to
return to finish the exam once it has been submitted. Good Luck!!!
Chemistry 1211
Exam IA
Name ___________________________ 2
1) (3 points) How is the weight of an object influenced when the gravitational force on the object is
increased?
a. the weight decreases
b. the weight increases
c. the weight is unchanged
d. the weight equal to the mass
2) (3 points) Which of the following best describes a mixture?
a. It's composition can vary but its properties remain constant.
b. It's composition and properties can vary.
c. It's composition remains constant but its properties varies.
d. It's composition and properties remains constant.
3) (3 points) Which of the following volume measurements is the least precise measurement?
a. 1.0 mL
b. 2.018 mL
c. 2.02 mL
d. 2.022 mL
e. 3 mL
4) (3 points) Two students combined two different volumes of water. The first student measured 25.4 mL
of water using a 100.0 mL graduated cylinder and the second student measured 0.15 mL of water using a
50.00 mL burette. What total volume should be reported after taking into account significant digits and the
convention used for rounding?
a. 25 mL
b. 25.5 mL
c. 25.55 mL
d. 25.6 mL
e. 26 mL
5) (3 points) How many nanometers are present in 4.5 cm?
a. 4.5 x 10-9 nm
b. 4.5 x 10-7 nm
c. 4.5 x 106 nm
d. 4.5 x 107 nm
e. 4.5 x 1011 nm
Chemistry 1211
Exam IA
Name ___________________________ 3
6) (3 points) What is the temperature given by the thermometer below written with the proper number of
significant digits?
34
Degees Celsius
33
32
31
30
a.
b.
c.
d.
e.
32.3 oC
32.30 oC
32 oC
32.300 oC
30 oC
7) (3 points) To extract information from a political prisoner during interrogation, Nurse Ratched is asked
to administer sodium pentothal (truth serum). If she injects the subject with 5.0 mL of the solution, how
many liters did she use?
a.
b.
c.
d.
3.5 × 106 L
2.5 × 10-3 L
5.0 × 10-3 L
5.0 × 103 L
Chemistry 1211
Exam IA
Name ___________________________ 4
8) (3 points) Which of the following is a chemical property of matter?
a. Color
b. Density
c. Freezing point
d. Malleability
e. Flammability
9) (3 points) Do the following calculation, and express the answer using correct scientific notation.
(6.00  1023)  (3.00) / (284)
a.
b.
c.
d.
e.
6.34  1021
1.58  1022
6.34  102
15.8
1.58  1021
10) (3 points) Do the following calculation and express the answer using the correct number of significant
figures.
(342)  (0.0012) ÷ 100.0
a.
b.
c.
d.
0.00410
0.0041
4.10  103
0.004104
11) (3 points) The symbol 40
K + stands for an isotope of potassium containing:
19
a. 19 electrons, 19 neutrons, 20 protons.
b. 18 electrons, 19 neutrons, 20 protons.
c. 19 electrons, 20 neutrons, 19 protons.
d. 18 electrons, 19 neutrons, 19 protons.
e. 18 electrons, 21 neutrons, 19 protons.
12) (3 points) A new element is prepared that has two isotopes. One isotope is 32.00% abundant and has a
mass of 103.2 u. The other has a mass of 105.2 u. What is the atomic mass of this element?
a. 103.8
b. 104.6
c. 104.2
d. 104.9
e. none of these
13) (3 points) Which element listed below is a member of the alkali metal family?
a. Br
b. Ca
c. K
d. S
e. none of these
Chemistry 1211
Exam IA
Name ___________________________ 5
14) (3 points) What is the molecular mass (to three significant figures) of C12H10O?
a. 170 u
b. 150 u
c. 190 u
d. 210 u
e. none of these
15) (3 points) Which substance listed below is an Ionic Compound?
a. B2H6
b. NOCl
c. NF3
d. H2O
e. CsBr
16) (3 points) Which ionic compound listed below does not have a correct formula?
a. SrSO4
b. Al(NO3)3
c. Ba(OH)2
d. CaPO4
e. K2O
17) (3 points) The formula mass of (NH4)2CrO4 is
a. 152 u
b. 138 u
c. 134 u
d. 83.0 u
e. none of these
18) (3 points) The formula of iron (III) sulfide is:
a. IrS3
b. Fe2(SO4)3
c. Fe2S3
d. Fe3S
e. Ir3SO4
19) (3 points) The systematic name of the compound H2SO3 is
a. sulfurous acid
b. sulfuric acid
c. hydrosulfuric acid
d. dihydrogen sulfite
e. none of these
Chemistry 1211
Exam IA
Name ___________________________ 6
20) (3 points) Complete and balance the following acid-base neutralization reaction. What are the
products with their respective coefficients when exact stoichiometric quantities of reactants are mixed?
__ HBr (aq) + __ Ca(OH)2 
a. 1 CaBr and 2 H2O
b. 1 CaBr2 and 2 H2O
c. 1 CaBr2 and 1 H3O+
d. 1 CaBr and 1 H2O2
e. 2 HOBr and 1 CaH2
21) (3 points) What is the oxidation number of each oxygen in HNO3?
a. +3
b. -2
c. -3
d. +4
e. none of these
22) (3 points) You have calculated that a certain chemical reaction can theoretically yield 25.0 g of a
certain product, but when the experiment is done, you find that the actual yield was only 15.0 grams. What
percentage of the theoretical yield does this represent?
a.
b.
c.
d.
60.0%
40.0%
15.0%
none of these
23) (3 points) The density of zinc is 7.13 g/cm3. What is the mass in kilograms of a 125 cm3 cylinder of
zinc?
a. 891 kg
b. 17.5 kg
c. 0.0175 kg
d. 0.891 kg
24) (3 points) Convert 323 K to °C.
a.
b.
c.
d.
373
50
305
596
25) (3 points) What is the molar mass of calcium phosphate?
a. 71.05 g/mol
b. 119.05 g/mol
c. 135.05 g/mol
d. 310.18 g/mol
e. 365.07 g/mol
Chemistry 1211
Exam IA
Name ___________________________ 7
26) (3 points) How many moles are in 19 g of NO2?
a. 0.63 mol
b. 0.41 mol
c. 2.3 mol
d. 1.2 mol
e. none of these
27) (3 points) How many molecules of CO2 are present in 20.0 g of CO2?
a. 1.46 x 10-21 molecules
b. 6.84 x 1020 molecules
c. 2.74 x 1023 molecules
d. 6.02 x 1023 molecules
e. 1.32 x 1024 molecules
28) How many moles of sodium ions, Na+ are present in 5.63 grams of sodium sulfate, Na2SO4?
a. 3.96 x 10-2 moles Na+ ions
b. 7.92 x 10-2 moles Na+ ions
c. 12.6 Na+ ions
d. 400 Na+ ions
e. 1.60 x 103 Na+ ions
29) (3 points) How many carbon atoms are contained in 5.50 g of ethane, C2H6?
a.
b.
c.
d.
2.75  1022
3.29  1024
2.21  1023
1.10  1023
30) (3 points) The weight % of S in K2SO4 is
a. 14.2%
b. 18.4%
c. 54.4%
d. 22.4%
31) (3 points) What is the empirical formula for a compound with the following composition by mass?
10.4 % C, 27.8% S and 61.7% Cl
a. CSCl2
b. C2S2Cl4
c. C2S2Cl
d. C3S8Cl18
e. C2S14Cl35
Chemistry 1211
Exam IA
Name ___________________________ 8
32) (3 points) What is the molecular formula of a compound with an empirical formula of C3H6O and a
molar mass of 174 g/mol?
a. C9H6O
b. C6H12O2
c. C9H18O3
d. C10H22O2
e. none of these
33) (3 points) Consider the following unbalanced reaction:
Al (s)
+
Cl2 (g) 
AlCl3 (s)
How many moles of Cl2 (g) are required to react with 10 moles of Al?
a.
b.
c.
d.
e.
10 moles
15 moles
20 moles
30 moles
60 moles
34) (3 points) How much SO2 is needed to react with exactly 16.0 g of O2 to produce SO3?
a. 32.0 g
b. 16.0 g
c. 128 g
d. 64.0 g
e. none of these
35) (3 points) Which of the following represents the correct coefficients to balance the following equation?
__NaNO3 + __PbO  __Pb(NO3)2 + __Na2O
a. 1, 1, 1, 1
b. 1, 2, 1, 2
c. 2, 1, 2, 1
d. 4, 2, 2, 2
e. none of these
36) (3 points) Which of the following represents the correct coefficients to balance the following equation?
__V2O5 + __CaS  __CaO + __V2S5
a. 1, 5, 5, 1
b. 1, 1, 1, 1
c. 5, 2, 1, 5
e. none of these
Chemistry 1211
Exam IA
Name ___________________________ 9
Chemistry 1211
Exam IA
Name ___________________________ 10