What is the concentration of O2(g), in parts per million, in a solution that contains 0.008 gram of O2(g) dissolved in 1000. grams of H2O(2)?

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0.8 ppm

8 ppm

80 ppm

800 ppm

Answer : The concentration of (g) in parts per million is, 8 ppm

Explanation : Given,

Mass of oxygen gas (solute) = 0.008 g

Mass of water (solvent) = 1000 g

First we have to calculate the mass of solution.

Mass of solution = Mass of solute + Mass of solvent = 0.008 + 1000 = 1000.008 g

Now we have to calculate the concentration of   (g) in parts per million.

ppm : It is defined as the mass of solute present in one million parts by mass of the solution.

Now put all the given values in this expression, we get

Therefore, the concentration of (g) in parts per million is, 8 ppm