Bulk flow is like public transportation — it moves large numbers of molecules, quickly.

容积运动就像公共交通——它快速移动大量分子。

However, at any given instant only a tiny number of molecules are dissociated ions.

是否与灼人的酸性有关呢？

Basic physics dictates that a given volume of gas has the same number of molecules regardless of what those molecules are.

而基本物理指出，相同体积的气体会有相同数量的分子，无论种类为何。

The top of the curve shows the speed that's close to the speed of the greatest number of molecules.

弯道顶部显示接近速度的速度 最大数量的粒子。

Avogadro proposed that two gases of equal volume at the same temperature and pressure contain the same number of molecules.

阿伏加德罗提出，在相同温度和压力下，两种体积相同的气体含有相同数量的分子。

This is really useful in chemistry, because two moles of any two compounds will have the same number of molecules.

这在化学中非常有用，因为任何两种化合物的两摩尔将具有相同的分子数。

So to find the thermal energy in a system, you just multiply the average kinetic energy by the number of molecules.

所以要找到系统中的热能，你必须 将平均动能乘以一个数字。

A mole is just a unit that’s used to measure the amount of a substance -- in this case, a gas, in terms of the number of molecules.

摩尔只是一个单位， 用于测量物质的数量——在这种情况下， 是一种气体， 以分子数量表示。

A mole is just a unit that's used to measure the amount of a substance -- in this case, a gas, in terms of the number of molecules.

原子是用来衡量物质数量的单位 在这种情况下，就分子数而言，是一种气体。

At the moment, the lab was attempting to develop a catalytic reaction as a substitute for molecular construction so that large numbers of molecules would stack themselves into the right arrangement.

目前，该实验室正试图开发一种催化反应来替代分子结构，以便大量分子能够自行堆叠成正确的排列。

Arabic numerals are already being used to denote how many atoms of an element there are in a molecule, the molecule's charge, its oxidation state, the number of molecules reacting in an equation.

阿拉伯数字已经被用来表示分子中元素的原子数量，分子的电荷， 氧化态，方程中反应的分子数量。