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Osmosis

77.Ppm is def...

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77.Ppm is defined as number of parts by mass of a solute present in per million parts of solution

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Q. Units of parts per million (ppm) or parts per billion (ppm) are often used to describe the concentrations of solute in very dilute solutions. The units are defined as the number of grams of solute per million or billion grams of solvent. The Bay of Bengal has 1.89 ppm of lithium ions. The molality of

L i^{+}

in water is: (atomic number of

L i = 7

Q. Assertion :The concentration of pollutants in water or atmosphere is often expressed in terms of ppm. Reason: Concentration in parts per million can be expressed as mass to mass, volume to volume and mass to volume

Q. To find out the concentration of

S O_{2}

in the air (in parts per million, i.e., ppm), the data was collected for 30 localities in a certain city and is presented below:

Q. Sea water contains

5.8 \times 10^{- 3}

g of dissolved oxygen per kilogram. The concentration of oxygen in parts per million is

Q. The content of the carbon dioxide in the air is 500 ppm(parts per million). What is the content of Oxygen in the air ?

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