1. To convert .621 hl to liters:
(a) "hl" stands for hectoliters, which is equal to 100 liters.
(b) The conversion factor is 1 hl = 100 liters.
(c) Multiply .621 hl by the conversion factor: 0.621 hl * 100 liters/hl = 62.1 liters.
2. To convert .013 dl to liters:
(a) "dl" stands for deciliters, which is equal to 0.1 liters.
(b) The conversion factor is 1 dl = 0.1 liters.
(c) Multiply .013 dl by the conversion factor: 0.013 dl * 0.1 liters/dl = 0.0013 liters.
3. To convert .00078 mg to kg:
(a) "mg" stands for milligrams, which is equal to 0.000001 kilograms.
(b) The conversion factor is 1 mg = 0.000001 kg.
(c) Multiply .00078 mg by the conversion factor: 0.00078 mg * 0.000001 kg/mg = 0.00000000078 kg.
4. To convert 2.45 g to cg:
(a) "g" stands for grams, which is equal to 100 centigrams.
(b) The conversion factor is 1 g = 100 cg.
(c) Multiply 2.45 g by the conversion factor: 2.45 g * 100 cg/g = 245 cg.
5. To convert 1.9 km to cm:
(a) "km" stands for kilometers, which is equal to 100,000 centimeters.
(b) The conversion factor is 1 km = 100,000 cm.
(c) Multiply 1.9 km by the conversion factor: 1.9 km * 100,000 cm/km = 190,000 cm.
6. To convert .0476 mm to dam:
(a) "mm" stands for millimeters, which is equal to 0.0001 decameters.
(b) The conversion factor is 1 mm = 0.0001 dam.
(c) Multiply .0476 mm by the conversion factor: 0.0476 mm * 0.0001 dam/mm = 0.00000476 dam.
7. To convert 6.4 ul to nl:
(a) "ul" stands for microliters, which is equal to 0.001 nanoliters.
(b) The conversion factor is 1 ul = 0.001 nl.
(c) Multiply 6.4 ul by the conversion factor: 6.4 ul * 0.001 nl/ul = 0.0064 nl.
By following these steps and using the appropriate conversion factors, you can convert between different units of measurement. The provided link contains a helpful resource for familiarizing yourself with SI prefixes and their corresponding values.