Question

Concentrations of lead in the bloodstream are often quoted in units of μg/dL. Averaged over an entire region, the mean concentration of lead in the blood was measured to be 1.5 μg/dL. Express this concentration in ppb. Express your answer to two significant figures.

Answer 1

[ ] = 15 ppb

Step-by-step explanation:

ppm ≡ mg / L

ppb = ppm * 1000

starting from maesured concentration:

⇒ [ ] = 1.5 microg / dL * ( 1 E-6 g / micrograms ) * ( mg / 0.001 g ) * ( dL / 0.1 L)

⇒ [ ] = 0.015 mg / L

⇒ [ ] = 0.015ppm * 1000

⇒ [ ] = 15 ppb