Chemistry
What two common ingredients cause an observable chemical reaction when mixed?
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Ethyl pentanoate would be classified as belonging to which derivative group?
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What gas in excited state is responsible for the bright red and yellow-green colors of the aurora?
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What allotrope of oxygen helps protect the biosphere from solar ultraviolet radiation?
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What is the sixth most abundant element on Earth, as well as the most abundant alkali metal?
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Which of the following items is most likely to be fortified with vitamins?
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Carbon Dioxide, often given off in a fire, is comprised of what?
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What symbol appears on the periodic table for Calcium which has the atomic number 20?
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