Chemistry

Clocks made out of what alkali metal are considered the most accurate of all clocks?

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Scotch tape and plastic wrap are made from what?
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When cutting onions what is released in the air that makes a person tear?
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What element is used as a filler gas in fluorescent and incandescent light bulbs?
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When wood has been heated to remove almost all volatile gases and leave the carbon, it is called what?
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Which substance has NaCl as its chemical formula?
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Which of these is a heavy gas used in specialized electric lamps?
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Which of these molecules are not planar?
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What two solvents could be used in a successful extraction?
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