What is the concentration in ppm of a 3.7 L solution d = 1.00 g/mL) containing 4.21 x 10^-7 kg of the pesticide DDT?

Question

Quizplus · Accepted Answer

To find the concentration in ppm, you first convert the volume of the solution to mass using the density given. Since the density is 1.00 g/mL, the mass of the solution is 3.7 L * 1000 mL/L * 1.00 g/mL = 3700 g = 3.7 kg. The concentration in ppm is then (mass of solute/mass of solution) * 10^6 = (4.21 x 10^-7 kg / 3.7 kg) * 10^6 = 1.14 x 10^-1 ppm.

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