名称：分子数;number of molecules 符号为N。指在给定系统中分子的数目。为无量纲量。必要时，用计数单位“个”作为其单位。在化学化工中，也常用“基本单元数”（number of elementary entities)的概念。符号仍为N。但分子不一定是基本单元，基本单元可以是分子。分子数计算公式：N=n·NA N 是粒子数，NA是阿伏加德罗常数（一般计算时取6.02×1023）n是该粒子的物质的量。
网络释义专业释义
... [=nucleus]核,胞核, 神经核,原子核,有机化合物的原子团 [=null cell]裸细胞,无标记 细胞 [=number of molecules] 分子数 ...
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... 分子层,分子膜。 molecular film 分子数；分子性 molecularity 巨分子，高分子 macromolecule ...
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短语
反应分子数 [化学] molecularity ; molecularity of reaction ; reaction molecularity ; molecularity reaction
分子数量遗传学 Molecular Quantitative Genetics
分子数据库 Molecular Databases
分子数密度 number density of molecules
原子分子数据 AMD ; atomic molecular data
反应的分子数 molecularity of reaction
体积分子数 volume number of molecules
克分子分数 [化学] molar fraction ; [化学] mole fraction ; molar fra
反应级数和反应分子数 reaction order and molecularity
双语例句原声例句
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那么系统能量仅仅，是这个平均值乘以总分子数。
And then the system energy would simply be the total number of molecules times that.
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在这个过程中，参与的分子数很少，通常有很大的波动。
The number of molecules is often small so that large fluctuations can occur.
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本质上来说压强是这些分子，单位时间轰击薄膜的力，乘以轰击的分子数。
Is basically the force of these molecules hitting that membrane per unit time, times the number of molecules hitting.
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So any time that you're drawing these molecular orbital diagrams you want to keep in mind that the number of electrons that you have in atomic orbitals, you need to add those together and put that many electrons into your molecule.
任何时候当你们画分子轨道图时,你们要记住,原子轨道里的电子数，你要把它们加在一起,并放到分子轨道里去。
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All right, so I did this not at all purposely, but this can point out for you that you need to make sure that the number of electrons that you have in your molecular orbital does match up with the total number that you have in your atomic orbitals.
我并不是故意这么做的，但这告诉我们必须要保证,分子轨道里的电子数,和原子轨道里的,总电子数能对上。
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We know we need to divide by 266, 266 but what we need you to help us with is to figure out this top number here and see how many particles are going to backscatter. So if the TAs can come up and quickly hand out 1 particle to everyone.
知道背散射的概率就可以了，我们知道要除以,但还需要你们来搞清楚,分子上的数是多少，有多少个发生背散射的粒子,助教们请过来,把这些球分给同学们。
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