18 reveals the source of the error. de an Exercise 1.5 1. If a man has a mass of 115 pounds, what is his mass in grams (1 lb = 453.6 g)? . 2. A piece of aluminium foil is 8.0 × 10-5 cm thick. What is its thickness in micrometres? 3. Convert 75 ng to mg. 4. Convert 6.75 m³ to μL. 5. Convert each of the following measurements to a unit that replaces the power of ten by a prefix. 3.22 x 10-6 S a b 9.56 × 10-³ m C 1.07 × 10³ g 6. Calcualte the mass in grams of two cubic inches (2.00 in³) of gold. Density of gold = 19.3 g cm-³.