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
