| 单词 | molecular mass |
| 释义 | > as lemmasmolecular mass molecular mass n. Physics = molecular weight n. ΚΠ 1894 Littell's Living Age 7 Apr. 10/1 We have reason to believe that each molecule of the same element always has the sme mass, and that different elements have in general different molecular masses. 1919 F. W. Aston in Nature 18 Dec. 393/2 Of more than forty different values of atomic and molecular mass so far measured all, without a single exception, fall on whole numbers. 1970 Nature 28 Nov. 889/2 Thus it would be correct to write..‘the molecular mass of protein X is 250,000 [read 25,000] daltons’; or ‘the relative molecular mass (that is, molecular weight) of protein X is 25,000’. 1991 New Scientist 28 Sept. 22/2 Compounds which share the same chemical composition and molecular mass yet differ in a physical or chemical property are known as isomers. < as lemmas |
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