Copper is a trace metal in the human body with a typical concentration of 110 mg in 75 kg of body mass. What is this concentration in units of parts per million (ppm)? A)1.5 $\times$ 10^-6 ppm B)1.5 ppm C)1.1 $\times$10^-5 ppm D)1.1 $\times$ 10^-7 ppm E)150 ppm

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Quizplus · Accepted Answer

To convert the concentration of copper in the body to parts per million (ppm), we use the formula: ppm = (mass of solute / mass of solution) x 10^6. Here, the mass of copper is 110 mg and the mass of the body is 75 kg (which is 75,000,000 mg). So, (110 mg / 75,000,000 mg) x 10^6 = 1.47 ppm, which rounds to 1.5 ppm.

Copper Is a Trace Metal in the Human Body with a Typical