Name: ________________________ Class: ___________________ Date: __________
ID: A
Exam #1 - CHEMISTRY 210 - Spring 2004
Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
____
1. What is the solution to the following expression, considering significant figures?
105
A) 4.95 x
B) 4.9514 x 10 5
C) 4.9513 x 10 5
D) 4.951 x
E) 5 x 105
985, 320
14.187 − 12.197
105
____
2. What is the mass number of an atom of bromine that has 44 neutrons?
A) 79
D) 44
B) 35
E) 9
C) 79.904
____
3. Express the solution to the following expression to the correct number of significant digits: 11.200 + 0.0886
A) 11.289
D) 11.29
B) 11.2886
E) 11
C) 11.3
____
4. Express the solution to the following expression to the correct number of significant digits:
A) 43000
B) 4.3000 x 10 4
C) 4.30 x 104
____
D) 4.3 x
E) 4.300 x 104
5. Of the following observations of aluminum metal, which are physical properties?
1. Aluminum reacts with hydrochloric acid, forming hydrogen gas.
2. Aluminum melts at 660°C.
3. The density of aluminum is 2.70 g/cm 3.
4. Aluminum is a good electrical conductor.
A) 1 and 4
B) 2 and 3
C) 3 and 4
____
104
D) 2, 3, and 4
E) 1, 2, 3, and 4
6. How many grams of gold contain 1.39 × 1023 atoms?
A) 0.0220 g
D) 45.5 g
B) 0.231 g
E) 853 g
C) 4.33 g
1
860.0
0.0200
Name: ________________________
ID: A
____
7. A common wavelength of light emitted from a red laser pointer is 6.50 × 102 nm. What is the wavelength in
meters?
D) 6.50 × 10-3 m
A) 6.50 × 10-9 m
-7
E) 6.50 × 100 m
B) 6.50 × 10 m
C) 6.50 × 10-5 m
____
8. Which of the following is Rutherford creditted with discovering?
A) the electron
D) the atom
B) the neutron
E) gold
C) the atomic nucleus
____
9. Which of the following is exactly equal to 12 amu?
A) 12 protons
D) a carbon-12 atom
B) 12 neutrons
E) a boron-12 atom
C) 12 electrons
____ 10. Which of the following represents the largest mass?
A) 540 cg
D) 0.030 kg
B) 3.0 x 109 pg
E) 1.5 x 10-8 Gg
C) 1.0 g
____ 11. Which of the following is not an SI base unit?
A) kilogram
D) meter
B) liter
E) second
C) Fahrenheit
____ 12. Th boiling point of liquid nitrogen is -195.80°C. What is this value in K?
A) -273.15
D) 77.35
B) -468.95
E) 273.15
C) -77.35
____ 13. How many significant figures are in the number 0.000300300
A) 10
B) 6
C) 9
D) 2
____ 14. Which of the following is an intensive property of matter?
A) temperature
D) volume
B) mass
E) boiling point
C) density
2
E)
4
Name: ________________________
ID: A
____ 15. The density of liquid mercury is 13.5 g/cm 3. What mass of mercury is required to fill a 2.00 L container?
D) 1.48 × 102 g
A) 6.75 × 10-3 g
-2
E) 2.70 × 104 g
B) 1.48 × 10 g
C) 6.75 g
____ 16. What is the mass of 0.229 mol Mg?
A) 106 g
B) 5.57 g
C) 0.180 g
D) 24.5 g
E) 9.42 × 10-3 g
____ 17. Which of the following is the correct symbol for a neutral atom that has 60 electrons and 82 neutrons?
A)
142
82
Pb
B)
82
142
Pb
C)
60
22
Ti
D)
82
60
Nd
E)
142
60
Nd
____ 18. A standard sheet of paper has dimensions of 8.50 inches by 11.0 inches. Calculate the area of the paper in
cm2.
D) 237 cm2
A) 14.5 cm2
2
B) 36.8 cm
E) 603 cm2
2
C) 93.5 cm
____ 19. Which of the following statements are true with respect to a single atom of each of the isotopes: oxygen-16
and oxygen-17?
A) They have the same mass.
D) A & C are both true.
B) They have the same number of protons.
E) B & C are both true.
C) They have the same number of electrons.
____ 20. The molar mass of titanium is 47.88 g/mole. What is the mass of a single Ti atom?
D) 1.258 × 1022 g
A) 3.468 × 10-26 g
-23
B) 7.951 × 10 g
E) 2.883 × 1025 g
-2
C) 2.089 × 10 g
3
ID: A
Exam #1 - CHEMISTRY 210 - Spring 2004
Answer Section
MULTIPLE CHOICE
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
D
A
A
C
D
D
B
C
D
D
C
D
B
C
E
B
E
E
E
B
1