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Selected exercises chapter 1 review, Chemistry Nivaldo Tro
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CHEM 107 SI Session Week 2 Day 1 (Chapter 1)
b) (568.99−232.1) ÷ 5.
An ibuprofen suspension for infants contains 100 mg/5.0 mL suspension. The recommended dose is 10 mg/kg body weight. How many mL of this suspension should be given to an infant weighing 18 lb? Use 1 lb = 0.45 kg. (Assume two significant figures.)
A volatile liquid (one that easily evaporates) is put into a jar, and the jar is then sealed. Does the mass of the sealed jar and its contents change upon the vaporization of the liquid?
Explain how the potential energy between two opposite charge changes as a function of the distance between them.
( Challenge yourself!) Suppose that polluted air has carbon monoxide (CO) levels of 15.0 ppm. An average human inhales about 0.50 L of air per breath and takes about 20 breaths per minute. How many milligrams of carbon monoxide does the average person inhale in an 8-hour period at this level of carbon monoxide pollution? Assume that the carbon monoxide has a density of 1. g/L. (Hint: do you know what ppm means?)