The chemical agent dioxin can be toxic or hazardous to humans in concentrations as small as one part per billion.If I am testing a soil sample that has a mass of 1.0 kg,how much dioxin would have to be present for me to label it toxic or hazardous?
A) a picogram
B) a kilogram
C) a microgram
D) a milligram
E) a nanogram
Correct Answer:
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