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44. The concentrations of lead in blood samples are often reported in units of micromoles of lead per liter of blood. Calculate the value of the concentration in these units of a blood sample containing 45 ppb lead, assuming that the density of blood is one gram per milliliter.

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The solution explains concentration conversions.

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A mole is an amount of a substance that contains 6.023*10^23 molecules or atoms. A micromole is one-millionth of a mole.

thus, 1 micro mole = 6.023*10^17 atoms

Owing to the dilute nature of the ...

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