Drug medications are often prescribed on the basis of body weight. The adult dosage of Elixophyllin, a drug used to treat asthma, is 6 mg/kg of body mass. What is the dose in milligrams for a 150-lb person?
The dose is 408 mg.
This is an exercise in unit conversion.
We should first convert the mass of the person to kilograms.
Now we can calculate the dose.