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.

Question

Chemistry

Brooke Carter

4 September, 04:22

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.

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Tate Barnett · Answer 1

[ ] = 15 ppb

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