Chemistry

When cutting onions what is released in the air that makes a person tear?

More Questions from Chemistry
What makes matter expand when it's heated and contract when it's cooled?
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Which of the following is not a common brominating agent?
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Which reagent is not commonly used to hydrate oplephins?
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What is the symbol used on the periodic table for the element Fluorine?
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Which of these would be used to measure the volume of liquid in a glass?
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Lithium on the periodic table is noted by which symbol?
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What are proteins that help speed up chemical reactions called?
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Which will have the smallest increase in temperature for the same amount of heat?
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