Answer : 0.0040 grams of lead is contained in the blood of an average adult human being.
Explnanation :
The lead content is given as 0.66 ppm.
That means there are 0.66 grams of lead in 1 million grams of blood.
Let us use this as a conversion factor as, [tex]\frac{0.66g Lead}{10^{6}g Blood}[/tex]
We have 6.0 x 10³ grams o blood. Te amount of lead in this is calculated as follows.
[tex]6.0 \times 10^{3} g Blood \times \frac{0.66g Lead}{10^{6} g Blood} = 3.96 \times 10^{-3} g Lead = 4.0 \times 10^{-3} g Lead[/tex]
0.0040 grams of lead is contained in the blood of an average adult human being.
