## Unit 2: Practice Quiz

# Significant Figures

__Multiple Choice__ (Choose the best answer.)

- How many significant figures are in 28,000,000 g?
1

2

3

4

5

- The measurement, 206.0
^{o}C, has how many significant digits?1

2

3

4

5

- The measurement, 0.00206 g, has how many significant digits?
1

2

3

4

5

- The measurement, 0.0020600 mole, has how many significant digits?
1

2

3

4

5

- The measurement, 2.060 x 10
^{ -3 }coulombs, has how many significant digits?1

2

3

4

5

- The measurement, 20600 molecules, has how many significant digits?
1

2

3

4

5

- Add the following three numbers and report your answer using significant
figures:
2.5 cm + 0.50 cm + 0.055 cm = ?

3.055 cm

3.06 cm

3.1 cm

3.0 cm

3 cm

- Subtract the following numbers and report your answer using significant
figures:
416 g - 210 g = ?

206. g

206 g

210. g

210 g

200 g

- Multiply the following three numbers and report your answer to the correct
number of significant figures:
0.020 cm x 50 cm x 11.1 cm = ?

10 cm

^{3}11 cm

^{3}11. cm

^{3}11.1 cm

^{3}11.10 cm

^{3}

- Divide the following three numbers and report your answer to the correct
number of significant figures:
0.530 g / 0.1010 mL = ?

2 g/mL

5.2 g/mL

5.3 g/mL

5.25 g/mL

5.248 g/mL