PPM is computed by dividing the mass of the solute by the mass of the resolution, then multiplying by 1,000,000. Both parts of the equation must be in the same format, weight or volume.
there is 0.551 mg of As in 365 g of solution
As concentration in ppm is 1.58 ppm.
ppm = (milligrams of solute) / (liters of solution).
This is an abbreviation for "parts per million" and it also can be expressed as milligrams per liter (mg/L).
This dimensions is the mass of a chemical or contaminate per unit volume of water. Seeing ppm or mg/L on a lab report means the exact thing.
To learn more about parts per million, refer
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