Biology, 26.04.2021 14:00 vorequeen

In the graph, "ppm" stands for parts per million. A concentration of one ppm is a ratio of one part to one million parts. Concentrations can also be expressed as a percentage. Why do you believe scientists choose ppm over percentage in some cases?

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In the graph, "ppm" stands for parts per million. A concentration of one ppm is a ratio of one part...

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