Question

What is ppm plzz tell answer​

Answer 1

Answer:

ppm stands for .Parts Per Million

Answer 2

Answer:

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

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