Question

what is PPM (parts per million) ??​

Answer 1

PPM( Parts per million):-

❥In science and engineering, the parts-per notation is a set of pseudo-units to describe small values of miscellaneous dimensionless quantities, e.g. mole fraction or mass fraction. ❥Since these fractions are quantity-per-quantity measures, they are pure numbers with no associated units of measurement

Answer 2

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Parts per million (ppm) is the number of units of mass of a contaminant per million units of total mass.

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