1.
Which of the following is a physical change?
A.
a piece of iron rusts
B.
milk turns sour
C.
gold is hammered into a thin sheet
D.
a slice of apple turns brown
E.
none of the above


2.
The distance between two carbon atoms in a given molecule is 154 picometers. Which of the following expresses this distance correctly?
A.
1.54 × 10–4 km
B.
1.54 × 10–10 mm
C.
1.54 × 10–13 km
D.
1.54 × 10–10 μm
E.
1.54 × 10–13 mm


3.
The surface area of a medium pizza is 929.9 cm2. Express this area in in2. (Note: 1 in = 2.54 cm. The answers are given in scientific notation. For example, 1.2e5 is equivalent to 1.2×105.)
A.
1.441e2 in2
B.
5.999e3 in2
C.
3.661e2 in2
D.
2.362e3 in2
E.
1.084e2 in2


4.
Which of the following is an S.I. base unit?
A.
molecule
B.
mile
C.
calorie
D.
radian
E.
kilogram


5.
A pure substance boils at 503.2 K. What is its boiling point in °C?
A.
776.3 °C
B.
261.8 °C
C.
937.8 °C
D.
230.0 °C
E.
471.2 °C


6.
The appropriate number of significant figures in the result of 5.327 × 694.173 is
A.
6
B.
1
C.
3
D.
0
E.
4


7.
If the result of the calculation (1.11 - 0.308) × 3.4260 is expressed with the proper number of significant figures, what is the implied uncertainty in it? (Note: The implied uncertainty is typically ±1 in the last reported significant figure of a number.)
A.
±1
B.
±0.1
C.
±0.01
D.
±0.001
E.
±0.0001


8.
Who is credited with discovering the atomic nucleus?
A.
Dalton
B.
Gay-Lussac
C.
Rutherford
D.
Thomson
E.
Millikan


9.
Consider the isotope copper-65, 65Cu. Select the combination which lists the correct atomic number, mass number, and number of neutrons, respectively.
A.
29, 65, 36
B.
29, 36, 65
C.
36, 29, 65
D.
65, 94, 29
E.
29, 65, 94


10.
Some believe that the fictional substance kryptonite is actually an element. Let's assume that kryptonite has two naturally occurring isotopes with the following isotopic masses and abundances:
Isotope
Isotopic mass (amu)
Abundance (%)
kryptonite-294
293.12
20.542
kryptonite-299
298.39
79.458

Calculate the average atomic mass of kryptonite.
A.
298.25 amu
B.
297.97 amu
C.
297.31 amu
D.
297.11 amu
E.
296.48 amu


11.
Which of the following gives the formula of aluminum sulfide?                                      
A.
Al2S3
B.
Al3S3
C.
Al2S4
D.
Al3S4
E.
Am3S3


12.
What is the name of   ?
A.
aluminum triiodide
B.
aluminum(III) iodide
C.
aluminum(I) iodide
D.
monoaluminum triiodide
E.
aluminum iodide


13.
What is the name of CrPO4?
A.
chromium(I) phosphate
B.
chromium(III) phosphate
C.
chromium phosphate
D.
chromium phosphotetraoxide
E.
chromium phosphide


14.
Which of the following gives the formula of tin(II) iodide?                                      
A.
SnI2
B.
Sn2I2
C.
SnI3
D.
Tn2I3
E.
Tn2I2


15.
What is the name of the acid with formula HClO3?
A.
hydrochloric acid
B.
chloric acid
C.
hypochlorous acid
D.
perchloric acid
E.
chlorophilic acid


16.
What is the name of Cl2O7?
A.
chlorine oxide
B.
dichlorine heptaoxide
C.
chlorine heptaoxide
D.
chlorine(II) oxide
E.
chloric heptaoxide


17.
Calculate the number of oxygen atoms in 18.8 g of Na2Cr2O7. (Note: NA = 6.022×1023. The answers are given in scientific notation. For example, 1.2e5 is equivalent to 1.2×105.)
A.
1.32e23 O atoms
B.
6.17e21 O atoms
C.
6.09e23 O atoms
D.
3.03e23 O atoms
E.
8.34e–25 O atoms


18.
Calculate the mass percent of oxygen in C4H6O2.
A.
7.03 %
B.
21.92 %
C.
15.03 %
D.
37.17 %
E.
55.80 %


19.
A compound containing only nitrogen and oxygen contains 25.94 % of nitrogen by mass. Determine its empirical formula.
A.
N2O6
B.
N3O6
C.
N3O5
D.
N2O5
E.
NO5


20.
When the following equation is balanced with the smallest whole number coefficients, the coefficient of oxygen is:
                    C7H16    +    O2    →    H2O    +    CO2
A.
9
B.
11
C.
13
D.
17
E.
8


21.
Given the reaction below, how many grams of NO can be produced from 189.2 g of NH3 and an excess of oxygen?
                   4NH3(g)    +    5O2(g)    →    4NO(g)    +    6H2O(g)
A.
333.3 g
B.
303.3 g
C.
283.3 g
D.
263.3 g
E.
236.7 g


22.
Tetraphosphorus hexaoxide (M = 219.9 g/mol) is formed by the reaction of phosphorus with oxygen gas.
P4(s)    +    3O2(g)    →    P4O6(s)
A mixture of 47.6 g of P4 (M = 123.9 g/mol) and 28.9 g of O2 (M = 32.00 g/mol) is allowed to react. What is the theoretical yield of P4O6(s)?
A.
49.4 g
B.
66.2 g
C.
81.0 g
D.
90.3 g
E.
69.9 g


23.
What is the percent yield for the reaction
PCl3(g)    +    Cl2(g)    →    PCl5(g)
if 32.1 g of PCl5 (M = 208.2 g/mol) are formed when 59.3 g of PCl3 (M = 137.3 g/mol) react with excess Cl2?
A.
20.1 %
B.
54.1 %
C.
35.7 %
D.
57.7 %
E.
39.0 %


24.
What volume, of 8.24 M KOH is needed to make 700.0 mL of 0.360 M KOH solution by dilution with water?
A.
160.2 mL
B.
6.2 mL
C.
4.2 mL
D.
30.6 mL
E.
20.8 mL


25.
How many milliliters of 3.10 M HCl are needed to react completely with 38.1 g of NaOH (M = 40.00 g/mol)?
                    HCl(aq)   +    NaOH(s)    →    NaCl(aq)    +    H2O(l)  
A.
358 mL
B.
391 mL
C.
422 mL
D.
277 mL
E.
307 mL


STOP This is the end of the test. When you have completed all the questions and reviewed your answers, press the button below to grade the test.