Chemistry
What is used in manufacturing matches, fertilizers and pesticides, and in vulcanization of rubber?
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High levels of what chemical may be in trailers provided for people displaced by Hurricane Katrina?
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What symbol appears on the periodic table for Calcium which has the atomic number 20?
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What are the products of propanoic acid and ethanol when the two are combined with warm sulphuric acid?
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What is best described as the separation of a material into elements or parts?
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Neptunium on the periodic table is noted by which symbol?
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