mm Review of Unit Conversion 1. Convert each of the following measurements into the specified units. a. 42.3 cm - d. 0.023 mm b.6.2 pm e. 214 um c. 21 km f. 570 nm 2. Rank the following mass measurements from smallest to largest: 11.6 mg. 1021 h. 0.0000006 kg. 0.31 mg cm m km