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көмірсутек
Compounds containing various combinations of hydrogen and carbon atoms. They may be emitted into the air by natural sources (e.g., trees) and as a result of fossil and vegetative fuel combustion, fuel volatilization, and solvent use. Hydrocarbons are a major contributor to smog.
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бензалконий хлориді
C<sub>6</sub>H<sub>5</sub>CH<sub>2</sub>(CH<sub>3</sub>)<sub>2</sub>NRCl A yellow-white ...