Chemistry
What is the oxidation number on the chromium in a dichromate ion "(Cr2O7)^2-"?
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Which of these is a chemical form of communication?
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What fibrous substance, used in insulation and other products, can cause cancer?
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What kind of cell has a negative EMF and a positive Gibbs free energy?
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What is the symbol used on the periodic table for the element Scandium?
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Nitrogen on the periodic table is noted by which symbol?
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What element is used in manufacturing cans, foils and kitchen utensils, pipes, and window frames?
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