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WorksheetsU6 The Mole Review #2 Sig Fig
Total questions: 21
Worksheet time: 14mins
Name
Class
Date
1.
How many significant figures does the following number have?
0.00345
0.00345
a)
6
b)
5
c)
3
d)
Ambiguous: 3,4,5, or 6
2.
How many significant figures does the following number have: 0.00204
a)
6
b)
4
c)
3
d)
2
3.
How many significant figures does the following number have?1.2500 x 103
a)
5
b)
3
c)
Ambiguous: 3 or 5
d)
7
4.
How many significant figures does the following number have: 100.00210
a)
7
b)
8
c)
10
d)
Ambiguous: 7 or 8
5.
Round 1289 to three significant figures
a)
1290
b)
130
c)
1300
d)
1.29x103
6.
What is 98.907 rounded to 1 significant figure?
a)
98.9
b)
90
c)
100
d)
1x102
7.
Solve and give your answer with the correct number of significant figures
(12.470)(271)
(12.470)(271)
a)
3366.9
b)
3.37x103
c)
3400
d)
3370
8.
Solve and give your answer with the correct number of significant figures
(12.470)(271)
(12.470)(271)
a)
3366.9
b)
3.37x103
c)
3400
d)
3370
9.
Solve and give your answer with the correct number of significant figures
129.6/3
129.6/3
a)
43.0
b)
43
c)
4x101
d)
40
10.
Solve and give your answer with the correct number of significant figures
24.28 + 12.5
24.28 + 12.5
a)
3.687 x 101
b)
36.8
c)
37
d)
3.70x101
11.
Round 1235 to 2 significant figures.
a)
12
b)
1200
c)
1200.
d)
1200.00
12.
Round the following value to one significant figure...
8291
a)
8000
b)
9000
c)
7000
d)
8300
13.
What is 78.5 rounded to one significant figure?
a)
79
b)
78.5
c)
70
d)
80
14.
0.0015289
Round to 3 significant figures.
(a)
15.
Solve and use the correct number of sig figs: 123 x 3.34
a)
411
b)
410.82
c)
410.8
d)
410
16.
Solve and use the correct sig figs: 4.70 ÷ 3.0001
a)
1.56661445
b)
1.57
c)
1.5667
d)
1.6
17.
Solve and use the correct sig figs: 15.65 x 0.23
a)
3.5995
b)
3.6
c)
4.0
d)
3.60
18.
How many sig figs are in the red number?
4.00 x 108 mm
4.00 x 108 mm
a)
1
b)
3
c)
9
d)
infinite
19.
How many Significant Figures in the number below?
0.456
0.456
a)
3
b)
4
c)
2
d)
1
20.
How many significant figures does the following number have: 0.002040
a)
6
b)
4
c)
3
d)
2
21.
Which one is rounded to the correct number of significant figures for the following equation?
7520 x 0.021 = 157.92
a)
157.92
b)
157.9
c)
158
d)
160
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