Metrics practice

1. Rounded correctly, 2.000 cm × 10.0 cm =
20.000 cm2 20.00 cm2 20 cm2 20.0 cm2
2. The number of significant figures in 0.00230300 m is
9 6 4 3 8
3. 5.5234 mL of mercury is transfered to a graduated cylinder with scale marks 0.1 mL apart. Which of the following will be the correct reading taken from the graduated cylinder?
5.5234 mL 5.52 mL 5.523 mL 5 mL 5.5 mL
4. Correctly rounded, 20.0030 - 0.491 g =
19.5120 g 19.512 g 19.5 g 20 g 19.51 g
5. Correctly rounded, the quotient 2.000 g / 20.0 mL is
0.100 g/mL 0.1000 g/mL 0.1 g/mL 0.10 g/mL