| 单词 | molecular formula |
| 释义 | > as lemmasmolecular formula molecular formula n. Chemistry a formula giving the number of atoms of each element in a single molecule of a substance (or a single structural unit of a polymer), without regard to their spatial arrangement. ΚΠ 1866 H. E. Roscoe Lessons Elem. Chem. xxxii. 286 Aldehyde is capable of existing in three other peculiar states... The molecular formula of paraldehyde appears to be, C6H12O3, or 3(C2H4O). 1906 E. M. Weaver Notes Mil. Explosives iv. 123 A soluble nitrocellulose of so called definite percentage of N(12·4), corresponding to the molecular formula, C30H38(NO2)12O25. 1934 C. C. Steele Introd. Plant Biochem. iii. 22 These two propyl alcohols have the same molecular formula, C3H7OH, but their structural formulæ (III) and (IV), are different; they are therefore structural isomers. 1995 European Jrnl. Biochem. 230 821 High-resolution mass spectral analysis gave a precise mass consistent with the molecular formula C27H40N14S. < as lemmas |
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