The "normal" lead content in human blood is about 0.40 part per million (that is, 0.40 g of lead per million grams of blood). A value of 0.80 part per million (ppm) is considered to be dangerous. How many grams of lead are contained in 6.0 x 10³ g of blood (the amount in an average adult) if the lead content is 0.62 ppm?

Explanation:

Grams of lead are contained in 6.0 x 10³ g of blood : 0.00372 gr or 3.72 x 10⁻³ gr

Further explanation

The concentration of a substance can be expressed in several quantities such as moles, percent (%) weight/volume,), molarity, molality, parts per million (ppm) or mole fraction. The concentration shows the amount of solute in a unit of the amount of solvent.

Solution = solvent + solute

ppm or parts per million are usually used to denote non-concentrated solutions.

If we use water solvent then 1 ppm can be expressed as 1 mg / L because 1 kg of water = 1 L of water (water density is 1 kg / L). For percent mass then 1 ppm can be expressed in 1 mg / 1kg

The lead content is 0.62 ppm

mass of blood = 6.10³ gr

grams of lead : 0.00372 gr

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