Calculate the mass of a cube of platinum of edge

12. Calculate the mass of a cube of platinum of edge length 0.040 mm (the density of
platinum = 21.4 g/cm 3 ). (5 points)
(Reference: Chang 1.57)
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13. A piece of silver (Ag) metal weighing 194.3 g is placed in a graduated cylinder
containing 242.0 mL of water. The volume of water now reads 260.5 mL. From these
data calculate the density of silver in units of g/mL. (5 points)
14. Cholesterol in blood is measured in milligrams of cholesterol per deciliter of blood. If
the average adult has 6.0 liters of blood, how many grams of cholesterol would be in
the blood of an average adult with a cholesterol reading of 185 mg/dL? Density of
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