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Significant Figures and Scientific Notation Test Questions

Chemistry Test Questions

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This is a collection of ten chemistry test questions with answers dealing with significant figures and scientific notation. The answers are at the bottom of the page.

Question 1

Use significant figures in your calculations.
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How many significant figures are in the following values?
a. 4.02 x 10-9
b. 0.008320
c. 6 x 105
d. 100.0

Question 2

How many significant figures are in the following values?
a. 1200.0
b. 8.00
c. 22.76 x 10-3
d. 731.2204

Question 3

Which value has more significant figures?
2.63 x 10-6 or 0.0000026

Question 4

Express 4,610,000 in scientific notation.
a. with 1 significant figure
b. with 2 significant figures
c. with 3 significant figures
d. with 5 significant figures

Question 5

Express 0.0003711 in scientific notation.
a. with 1 significant figure
b. with 2 significant figures
c. with 3 significant figures
d. with 4 significant figures

Question 6

Perform the calculation with the correct number of significant digits.
22.81 + 2.2457

Question 7

Perform the calculation with the correct number of significant digits.
815.991 x 324.6

Question 8

Perform the calculation with the correct number of significant digits.
3.2215 + 1.67 + 2.3

Question 9

Perform the calculation with the correct number of significant digits.
8.442 - 8.429

Question 10

Perform the calculation with the correct number of significant digits.
27/3.45

Answers

1. a. 3   b. 4   c. 1   d. 4
2. a. 5   b. 3   c. 4   d. 7
3. 2.63 x 10-6
4. a. 5 x 106   b. 4.5 x 106   c. 4.61 x 106   d. 4.6100 x 106
5. a. 4 x 10-4   b. 3.7 x 10-4   c. 3.71 x 10-4   d. 3.711 x 10-4
6. 25.06
7. 2.649 x 105
8. 7.2
9. 0.013
10. 7.8

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