Solutions to Practice Problems Week 2

1. How many mg are in a 5.0 grain aspirin tablet? (1.00 grain = 64.8 mg) 1. Convert 6.7 x 1015 um3 into m3.

6.7 x 1015 um3 * (10-6 m / um)3 = 0.0067 m3

1. How many centimeters are in 6.15 feet? 1. How many grams in 0.850 tons? (2000 lb = 1 ton (exact);  1 lb = 453.59 grams) 1. The price of gasoline in France is 5.91 French francs/liter. What is the cost in \$/gal.? (\$1 = 5.25 French francs; 1.056688209 qt = 1.00 liters) 1. What is the volume in pints of 2.75 lb of gold? (density of gold: 19.3 g/cm3) 1. The density of mercury is 13.546 g/cm3. What is the density of mercury in lb/gal.? 1. In a normal person, the level of blood sugar is 85 mg/100.0 mL (milligrams per deciliter). If the average body contains about 11 pints of blood, how many pounds of blood sugar are present in the blood? 1. A pediatric dosage of a certain antibiotic is 32 mg/kg of body weight per day. How much antibiotic, in milligrams per day, should be administered to a child who weighs 38 lb? 1. How many grams of Al can be heated from 25.0°C to 125°C by 975 calories? (specific heat of Al: 0.221 ) 1. It was found that 60.9 calories of heat must be absorbed to raise the temperature of a 50.5 g sample of an unknown metal from 20.0°C to 31.4°C. What is the specific heat capacity of the metal? 