Arts and Sciences Program Chemistry Department Chemistry Placement Test

Arts and Sciences Program
Chemistry Department
Chemistry Placement Test
Fall 2014
Sample Test
Note:
These questions (20) are only a guide and are NOT the
actual questions from the A&S Chemistry Placement
Test.
The answers to this Sample Test are at the end of this
document.
1
A&S Chemistry Placement Test – Sample Test
Choose one answer only ( A, B, C, D or E ) for each multiple choice question.
Put all your answers on the Answer Sheet provided (Machine-readable).
1.
Which of the following numbers has 4 significant figures?
A
0.00178
B 0.0001
D
6.32
12
E 7.19 x 10
2.
How many mm are there in 5.25 km?
A
55200 mm
6
B 5.25 x 10 mm
D
5.52 x 103 mm
E 52,500 mm
3.
A
4.
Burning a piece of paper
B Sugar dissolving in
An ice cube melts
C Mixing dry sand with
salt crystals
E Sharpening a pencil
Calculate the mass of the air contained in a room that measures 2.50 m  5.50 m  3.00 m
(density of air = 1.29 g/dm3 at 25C).
A
3.13  10-5 g
B 32.0 kg
D
53.2 g
E 32.0 g
5.
C 525,000 mm
Which one of these represents a chemical change
water
D
C 1.024
C 53.2 kg
6.0 km is how many micrometers?
A
6.0  106 µm
B 1.7  10-7 µm
D
1.7  10-4 µm
E 6.0  103 µm
C 6.0  109 µm
2
6.
Which of the following is a mixture?
A
sulfur
B air
D
nitrogen
E salt
7.
A row in the periodic table is known as
A
Metals
B group
D
A period
E Transition metals
8.
C Non-metals
What is the formula of the compound formed between a Calcium ion and a oxide ion
A
Ca202
B Ca20
D
Ca02
E Ca(0H)2
9.
C carbon dioxide
C Ca0
What is the coefficient of silver (Ag) when the equation is balanced
Zn (s) + AgCl (aq) → ZnCl2 (aq) + Ag
A
3
B 1
D
5
E 7
C 2
3+
10. An aluminum ion, Al , has:
A
D
13 protons and 13
electrons
B 27 protons and 24
13 protons and 10
electrons
E 10 protons and 13
electrons
C 16 protons and 13
electrons
electrons
11. Which is the correct formula for copper(II) nitrate?
A
Cu2NO3
B CuNO3
D
Cu(NO3)3
E Cu(NO3)2
C Cu(NO2)2
3
12. Vanadium is a transition metal. The name for VSO4 should be
A
Vanadium sulfide
B Vanadium(I) sulfite
D
Vanadium(II) sulfate
E Vanadium sulfur
C Vanadium(I) sulfate
tetroxide
13. Calculate the percent, by mass of oxygen in NaN03
A
56.5%
B 27.0%
D
16.00%
E 48.0%
C 16.5%
Cl (75.8%), 37Cl (24.2%), are 34.969
amu and 36.966 amu respectively. Calculate the average atomic mass of chlorine?
14. The atomic masses of two isotopes of chlorine
A
35.45 amu
B 70.90 amu
D
35.97 amu
E 36.00 amu
35
C 63.25 amu
15. How many silicon atoms are there in 1.00 g of silicon?
A
1 atom
B 0.0356 atoms
D
2.14  1022 atoms
E 1.75  1025 atoms
C 2.57  1023 atoms
16. What is the number of moles in 36.8g of Nickel?
A
1.59 mols
B 0.627 mols
D
0.314 mols
E 1.0 mols
C 3.18 mols
17. If the reaction of 150. g of ammonia with 150. g of oxygen gas produces or (yields) 87. g
of nitric oxide (NO), what is the percent yield of this reaction?
4NH3(g) + 5O2(g)  4NO(g) + 6H2O(g).
A
100%
B 50%
D
77%
E 48%
C 15%
4
18. How many grams of Cl2 can be prepared from the reaction of 16.0 g of MnO2 and 30.0 g
of HCl according to the following chemical equation?
MnO2 + 4HCl  MnCl2 + Cl2 + 2H2O
A
26.0g
B 0.13g
D
18.0g
E 70.0g
C 13.0g
19. How many grams of silver nitrate are necessary to react completely with 7.000 moles of
copper?
Cu + 2 AgNO3  Cu(NO3 )2 + 2 Ag
A
170g
B 1189g
D
1510g
E 2379g
C 350g
20. What volume of 2.5 M KOH is needed to provide 0.80 moles of KOH
A
2L
B 0.32 L
D
10.5 L
E 3.13 L
C 0.15 L
5
ANSWER KEY to the A&S Chemistry Placement Test: Sample Test
Note: The Sample Question numbers are matched with the topic numbers that are in the
Background Information Booklet.
Sample
Question
Correct
Answer
Sample
Question
Correct
Answer
C
Topic
Number
3
11
E
Topic
Number
8
1
2
B
3/4
12
D
8
3
A
2
13
A
9
4
C
3/4
14
A
6
5
C
3
15
D
9
6
B
1
16
B
9
7
D
7
17
D
13
8
C
8
18
C
12
9
C
10
19
E
11
10
D
5/6
20
B
14
6