Unit 2: Practice Quiz

Significant Figures

Multiple Choice (Choose the best answer.)

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

   1

   2

   3

   4

   5

   ---

2. The measurement, 206.0 ^oC, has how many significant digits?

   1

   2

   3

   4

   5

   ---

3. The measurement, 0.00206 g, has how many significant digits?

   1

   2

   3

   4

   5

   ---

4. The measurement, 0.0020600 mole, has how many significant digits?

   1

   2

   3

   4

   5

   ---

5. The measurement, 2.060 x 10 ^-3 coulombs, has how many significant digits?

   1

   2

   3

   4

   5

   ---

6. The measurement, 20600 molecules, has how many significant digits?

   1

   2

   3

   4

   5

   ---

7. 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

   ---

8. 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

   ---

9. 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 cm³

   11 cm³

   11. cm³

   11.1 cm³

   11.10 cm³

   ---

10. 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

    ---