Chem 065 - Introductory General Chemistry » Winter 2024 » Practice Significant Figures
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Question #1
How many significant figures are in the number 2903?
A.
2
B.
5
C.
3
D.
4
E.
none of these
Question #2
How many significant figures are represented by the following number that is written in scientific notation? 2.5 × 103
A.
3
B.
0
C.
2
D.
1
Question #3
When rounding the number 2.348615 to 4 significant figures, what is the correct value?
A.
none of these
B.
2.349
C.
2.348
D.
2.34
E.
2.349
Question #4
What answer should be reported, with the correct number of significant figures, for the following calculation? (433.621 - 333.9) × 11.900
A.
1.187 × 103
B.
1.18680 × 103
C.
1.19 × 103
D.
1.1868 × 103
E.
1.186799 × 103
Question #5
What answer should be reported, with the correct number of significant figures, for the following calculation? (249.362 + 41) / 63.498
A.
4.57
B.
4.6
C.
4.573
D.
4.57277
E.
4.5728
Question #6
What answer should be reported, with the correct number of significant figures, for the following calculation? (965.43 × 3.911) + 9413.4136
A.
13189.2
B.
1.32 × 104
C.
13189
D.
1.319 × 104
E.
1.3 × 104
Question #7
The number 0.010100 has _______ significant figures.
A.
2
B.
6
C.
4
D.
7
E.
3
F.
5
Question #8
The correct number of significant figures in the number 1.250100 is:
A.
6
B.
5
C.
ambiguous
D.
4
E.
7
Question #9
The correct number of significant figures in the number 0.027090 is:
A.
5
B.
5
C.
5
D.
5
E.
5
F.
5
Question #10
The correct number of significant figures in the number 0.002320 is:
A.
7
B.
4
C.
ambiguous
D.
6
E.
3
Question #11
Suppose a thermometer has marks at every one degree increment and the mercury level on the thermometer is exactly between the 25 and 26 degree Celsius marks. We should properly report the temperature measurement as:
A.
25°C
B.
25.5°C
C.
25.55°C
D.
25.50°C
E.
26°C
Question #12
In the number 48.930, which digit is estimated?
A.
4
B.
8
C.
0
D.
9
E.
3
Question #13
When rounding the number 2.348615 to 4 significant figures, what is the correct value?
A.
2.348
B.
2.34
C.
2.349
D.
2.349
E.
2.35
Question #14
A student recorded three different measurements (in cm) that he made: 25.66, 24, 24.8956. He then calculated the average for these measurements on a calculator as 24.8518667. What answer should he report, considering the proper number of significant figures?
A.
25
B.
24.9
C.
25.8
D.
24
E.
24.8
Question #15
How many significant figures is in the final answer: 99.0 cm + (2×5.56 cm) ? The digit 2 is an exact number in this calculation.
A.
4
B.
1
C.
3
D.
2
E.
5
Question #16
What is the result of the following operation: (53.987g-53.110 g)÷ 0.8901 mL?
A.
0.9852 g/mL
B.
0.9853 g/mL
C.
0.985283 g/mL
D.
0.985 g/mL
E.
0.98528 g/mL
Question #17
What is the answer with the correct significant figures to the question below?(1.302×103)+952.7(1.57×102)−12.22 Leave the answer in decimal notation.
A.
156
B.
1.56
C.
15.6
D.
0.156
Question #18
How many significant figures are there in the answer to the following problem? (8.881 × 2.100) + 0.590 = ?
A.
three
B.
four
C.
two
D.
one
Question #19
Determine the answer to the following equation with correct number of significant figures: 106 ÷ 9.02 × 1.9 = ________
A.
22
B.
22.3
C.
22.328
D.
22.32816
E.
none of these
Question #20
Determine the answer to the following equation with correct number of significant figures: 2.02 + 8.102 - 0.0297 = ________
A.
10.09
B.
10.1
C.
10.0923
D.
10.092
E.
none of these
Question #21
A.
80.55
B.
81
C.
80.5498
D.
80.5
E.
none of these
Question #22
Determine the answer to the following equation with correct number of significant figures: (4.123 × 0.12) + 24.2 = ________
A.
24.695
B.
24.7
C.
none of these
D.
25
E.
24.7
Question #23
How many significant figures should be reported in the answer to the following calculation? (1.40) × (17.1) =
A.
none of these
B.
1
C.
3
D.
2
E.
0
Question #24
How many significant figures should be reported in the answer to the following calculation? (8.50) × (29.0) × (1.0947) =
A.
3
B.
2
C.
5
D.
4
E.
none of these
Question #25
How many significant figures should be reported in the answer to the following calculation? (4.921) + (16.2) =
A.
1
B.
2
C.
none of these
D.
3
E.
4
Question #26
How many significant figures should be reported in the answer to the following calculation? (43.980) × (19.0023 + 25) =
A.
2
B.
none of these
C.
3
D.
1
E.
4
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