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 * 10-6 ppm
B) 1.5 ppm
C) 1.1 * 10-5 ppm
D) 1.1 * 10-7 ppm
E) 150 ppm
Correct Answer:
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