Chem 1441 Test Questions from Previous Exams Page 1 of 7
Test 1. Chapters 1, 2, and 3 (Rogers textbook)
Chapter 1 – Introduction to the Study of Chemistry
1. How many significant figures are in the measured quantity below?
0.000420
a) 2
b) 3
c) 6
d) 7
e) an infinite number
2. A certain balance will report the mass of a sample to the nearest 0.001 g. A sample that weighs about 25 g is weighed on this
balance. How many significant figures should be reported for this measurement?
a) 1
b) 2
c) 3
d) 4
e) 5
3. A student began an experiment by measuring out 7.482 g of calcium chloride. A few minutes later, she measured out 4.9 g of
additional calcium chloride using a different instrument. When she reports the total mass of calcium chloride, how many
significant figures should she use?
a) 1
b) 2
c) 3
d) 4
e) 5
4. Perform the calculation below. How should the result of this calculation be expressed, taking into account the appropriate use
of significant figures?
29.725 + 91.42
7.95572 - 0.000720
a) 15.2
b) 15.23
c) 15.229
d) 15.2288
e) 15.22879
5. When the following calculation is performed, how many significant figures will the answer have?
1.900 + 0.0200
+ 0.06223 = ???
23.75 + 0.25
a) 1
b) 2
c) 3
d) 4
e) 5
6. Perform the following calculation and express the result using the appropriate number of significant figures:
2.3 x 10-6 + 3.722 x 10-7 + 7.9788 x 10-4
a) 8.0 x 10-4
b) 8.01 x 10-4
c) 8.006 x 10-4
d) 8.0055 x 10-4
e) 8.005522 x 10-4
, Chem 1441 Test Questions from Previous Exams Page 2 of 7
Test 1. Chapters 1, 2, and 3 (Rogers textbook)
7. Perform the calculation below. How should the result of this calculation be expressed, taking into account the appropriate use
of significant figures?
4.93 x 10-7 + 8.9440 x 10-6 + 7.3 x 10-8
a) 9.5 x 10-6
b) 9.51 x 10-6
c) 9.510 x 10-6
d) 9.5100 x 10-6
e) 9.51000 x 10-6
8. All of the following measurements are expressed using SI units except
a) 525 K
b) 155 m/s
c) 1.88 kg of iron
d) 3.42 mol of CH4
e) 5.75 L of N2
9. What is the SI unit of mass, and what is the SI unit of volume?
a) mg, cm3
b) g, cm3
c) g, L
d) kg, L
e) kg, m3
10. Convert 475 ºC to Kelvin.
a) 202 K
b) 748 K
c) 246 K
d) 887 K
e) 704 K
11. Convert 34.2 µg to cg.
a) 3.42 x 10-4 cg
b) 3.42 x 10-2 cg
c) 3.42 x 10-5 cg
d) 3.42 x 10-3 cg
e) 3.42 x 10-7 cg
12. Acceleration due to gravity of a free-falling object is 9.8 m/s2. Express this value in units of inches/ms 2.
a) 3.9 x 10-4 in/ms2
b) 0.39 in/ms2
c) 0.039 in/ms2
d) 3.9 x 10-3 in/ms2
e) 3.9 x 104 in/ms2
13. The density of titanium is 4.50 g/cm3. What is the mass, in pounds, of 1.00 ft3 of titanium?
a) 139 lbs
b) 9.92 lbs
c) 281 lbs
d) 43.6 lbs
e) 302 lbs
Test 1. Chapters 1, 2, and 3 (Rogers textbook)
Chapter 1 – Introduction to the Study of Chemistry
1. How many significant figures are in the measured quantity below?
0.000420
a) 2
b) 3
c) 6
d) 7
e) an infinite number
2. A certain balance will report the mass of a sample to the nearest 0.001 g. A sample that weighs about 25 g is weighed on this
balance. How many significant figures should be reported for this measurement?
a) 1
b) 2
c) 3
d) 4
e) 5
3. A student began an experiment by measuring out 7.482 g of calcium chloride. A few minutes later, she measured out 4.9 g of
additional calcium chloride using a different instrument. When she reports the total mass of calcium chloride, how many
significant figures should she use?
a) 1
b) 2
c) 3
d) 4
e) 5
4. Perform the calculation below. How should the result of this calculation be expressed, taking into account the appropriate use
of significant figures?
29.725 + 91.42
7.95572 - 0.000720
a) 15.2
b) 15.23
c) 15.229
d) 15.2288
e) 15.22879
5. When the following calculation is performed, how many significant figures will the answer have?
1.900 + 0.0200
+ 0.06223 = ???
23.75 + 0.25
a) 1
b) 2
c) 3
d) 4
e) 5
6. Perform the following calculation and express the result using the appropriate number of significant figures:
2.3 x 10-6 + 3.722 x 10-7 + 7.9788 x 10-4
a) 8.0 x 10-4
b) 8.01 x 10-4
c) 8.006 x 10-4
d) 8.0055 x 10-4
e) 8.005522 x 10-4
, Chem 1441 Test Questions from Previous Exams Page 2 of 7
Test 1. Chapters 1, 2, and 3 (Rogers textbook)
7. Perform the calculation below. How should the result of this calculation be expressed, taking into account the appropriate use
of significant figures?
4.93 x 10-7 + 8.9440 x 10-6 + 7.3 x 10-8
a) 9.5 x 10-6
b) 9.51 x 10-6
c) 9.510 x 10-6
d) 9.5100 x 10-6
e) 9.51000 x 10-6
8. All of the following measurements are expressed using SI units except
a) 525 K
b) 155 m/s
c) 1.88 kg of iron
d) 3.42 mol of CH4
e) 5.75 L of N2
9. What is the SI unit of mass, and what is the SI unit of volume?
a) mg, cm3
b) g, cm3
c) g, L
d) kg, L
e) kg, m3
10. Convert 475 ºC to Kelvin.
a) 202 K
b) 748 K
c) 246 K
d) 887 K
e) 704 K
11. Convert 34.2 µg to cg.
a) 3.42 x 10-4 cg
b) 3.42 x 10-2 cg
c) 3.42 x 10-5 cg
d) 3.42 x 10-3 cg
e) 3.42 x 10-7 cg
12. Acceleration due to gravity of a free-falling object is 9.8 m/s2. Express this value in units of inches/ms 2.
a) 3.9 x 10-4 in/ms2
b) 0.39 in/ms2
c) 0.039 in/ms2
d) 3.9 x 10-3 in/ms2
e) 3.9 x 104 in/ms2
13. The density of titanium is 4.50 g/cm3. What is the mass, in pounds, of 1.00 ft3 of titanium?
a) 139 lbs
b) 9.92 lbs
c) 281 lbs
d) 43.6 lbs
e) 302 lbs
