The concentration of Li in the human body is approximately 30 ng/g body mass. How many $\beta$g of Li are there in a person weighing 170 lb? 1 lb = 454 g

Question

Quizplus · Accepted Answer

First, we need to convert 170 lb to grams:

170 lb x 454 g/lb = 77,380 g

Next, we can use the concentration given in ng/g to convert to grams of Li:

30 ng/g x 77,380 g = 2.3214 g

However, the answer choices are all in femtograms (fg), so we need to convert:

2.3214 g x 10^15 fg/g = 2.3214 x 10^15 fg

Rounding to the nearest tenth gives us 2.3 x 10^15 fg, which is answer choice C.

The Concentration of Li in the Human Body Is Approximately β\betaβ

The Concentration of Li in the Human Body Is Approximately $\beta$