A medication is given at a dosage of 3.000 mg of medication per kg of body weight. If 0.1500 g of medication is given, then what was the patient’s weight in pounds (lbs.)?

Question

put the answer in scientific notation

Answer 1

Start with the extensive variable: How much chemical? and go to another extensive variable "How many pounds of human body weight?"

We can do it all at once by cancelling units: (We'll need to know that 453.6 g is approximately 1 pound)

.15 g D(1000 mg D/ g D)(1kg BW/3 mg D)(1000 g BW/1kg BW)(1 pound BW/453.6 g) = lbs of Body Weight. D = drug and BW = Body weight.

Hope that helps.