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

How many significant figures are in the following values?

a. 4.02 x 10

b. 0.008320

c. 6 x 10

d. 100.0

a. 4.02 x 10

^{-9}b. 0.008320

c. 6 x 10

^{5}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. 42. a. 5 b. 3 c. 4 d. 7

3. 2.63 x 10

^{-6}

4. a. 5 x 10

^{6}b. 4.5 x 10

^{6}c. 4.61 x 10

^{6}d. 4.6100 x 10

^{6}

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 10

^{5}

8. 7.2

9. 0.013

10. 7.8