etaylor3421
etaylor3421
07.01.2021 • 
Biology

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?


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

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