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| existing as free, uncombined atoms |
| to remove impurities from a gas by chemical means, as sulfur dioxide from smokestack gas or carbon dioxide from exhaled air in life-support packs |
| diazonium salt | |
| —n | |
| any of a class of compounds with the general formula ArN:N--M+, where Ar is an aryl group and M is a metal atom; made by the action of nitrous acid on aromatic amines and used in dyeing | |
diazonium salt
any of a class of organic compounds that have the molecular structure
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