1.

What is the concentration of a solution with 10 grams of calcium in 1000 m^3 of water?(a) 150 ppm(b) 250 ppm(c) 800 ppm(d) 1000 ppm

Answer» Correct answer is (b) 250 ppm

The explanation is: Moles of calcium = 10/40 =0.25, => concentration in ppm = (0.25/1000)*10^6 = 250 ppm.


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