## Chemistry: A Molecular Approach (3rd Edition)

Published by Prentice Hall

# Chapter 1 - Sections 1.1-1.8 - Exercises - Problems by Topic - Page 40: 101

#### Answer

$$0.95 ml$$

#### Work Step by Step

1. First we calculate the mass concentration of solution. To do so, we divide mass with volume: $\frac{80 mg}{0.8 ml} = 100g/ml$ 2. Next, we convert the body weight from lbs to kg. The conversion factor is 1 lbs = 0.45359 kg. $14lbs\times0.45359 lb/kg = 6.35029 kg$ 3. Next we multiply the body weight in kg with mass of acetaminophen needed per kg to get the required mass of acetaminophen. $6.35029 kg\times15 mg = 95.25440 mg$ 4. Finally, we divide the required mass of acetaminophen with its mass concentration to get the required volume of acetaminophen solution $95.25440mg\div100 mg/ml = 0.9525440 ml$ 5. Round to two significant figures to get $$0.95 ml$$

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