avogadro number

简明释义

阿伏伽德罗数

英英释义

例句

1.The mole is defined as the amount of substance that contains as many elementary entities as there are atoms in 12 grams of carbon-12, which is known as the avogadro number 阿伏伽德罗常数.

摩尔被定义为含有与12克碳-12中原子数量相同的基本实体数量的物质，这个数量被称为avogadro number 阿伏伽德罗常数。

2.To find the number of atoms in a sample, multiply the number of moles by the avogadro number 阿伏伽德罗常数.

要找到样品中的原子数，将摩尔数乘以avogadro number 阿伏伽德罗常数。

3.One mole of any substance contains approximately avogadro number 阿伏伽德罗常数 particles.

任何物质的一摩尔大约包含avogadro number 阿伏伽德罗常数个粒子。

4.In chemistry, we often use the avogadro number 阿伏伽德罗常数 to convert between moles and molecules.

在化学中，我们经常使用avogadro number 阿伏伽德罗常数来转换摩尔和分子之间的关系。

5.The avogadro number 阿伏伽德罗常数 is approximately 6.022 x 10^23.

该avogadro number 阿伏伽德罗常数约为6.022 x 10^23。

作文

The concept of the Avogadro number is fundamental in the field of chemistry. It represents the number of atoms, ions, or molecules in one mole of a substance, which is approximately 6.022 x 10^23. This number is not just a random figure; it is derived from the work of Amedeo Avogadro, an Italian scientist who first proposed that equal volumes of gases, at the same temperature and pressure, contain an equal number of molecules. Understanding the Avogadro number is essential for students and professionals in chemistry because it provides a bridge between the atomic scale and the macroscopic scale that we can observe and measure. When we talk about moles, we are essentially discussing a counting unit that allows chemists to quantify the amount of a substance in a way that is manageable and understandable. For example, if you have one mole of carbon atoms, you have approximately 6.022 x 10^23 carbon atoms. This allows chemists to perform calculations involving chemical reactions, concentrations, and stoichiometry with ease. The Avogadro number is crucial for these calculations because it gives a specific quantity to work with, making it easier to convert between the mass of a substance and the number of particles it contains.In practical applications, the Avogadro number is used in various fields, including pharmaceuticals, materials science, and environmental science. For instance, in drug formulation, knowing how many molecules of an active ingredient are present in a dose can help ensure that the medication is both effective and safe. Similarly, in materials science, understanding the number of atoms in a given volume of material can influence the properties of that material, such as its strength or conductivity.Moreover, the Avogadro number plays a significant role in the ideal gas law, which relates the pressure, volume, and temperature of a gas. According to this law, one mole of any gas occupies a volume of 22.4 liters at standard temperature and pressure (STP). This relationship is vital for predicting how gases behave under different conditions, which is important in numerous scientific and industrial processes.In summary, the Avogadro number is a cornerstone of chemistry that facilitates our understanding of the microscopic world. It allows us to translate the abstract concept of atoms and molecules into tangible amounts that can be measured and manipulated. The implications of this number extend far beyond the classroom, impacting various industries and scientific research. By grasping the significance of the Avogadro number, we gain valuable insight into the nature of matter and the principles that govern chemical reactions. This understanding is not only academically enriching but also practically essential in our increasingly science-driven world.

在化学领域，阿伏伽德罗常数的概念是基础性的。它代表了一个物质中每摩尔所含的原子、离子或分子的数量，大约为6.022 x 10^23。这个数字并不是一个随机的数字；它来源于意大利科学家阿梅德奥·阿伏伽德罗的研究，他首次提出在相同温度和压力下，相同体积的气体含有相等数量的分子。理解阿伏伽德罗常数对化学学生和专业人士至关重要，因为它提供了原子尺度与我们可以观察和测量的宏观尺度之间的桥梁。当我们谈论摩尔时，我们实际上是在讨论一个计数单位，使化学家能够以可管理和可理解的方式量化物质的数量。例如，如果你有一摩尔的碳原子，你大约有6.022 x 10^23个碳原子。这使化学家能够轻松进行涉及化学反应、浓度和化学计量的计算。阿伏伽德罗常数对这些计算至关重要，因为它提供了一个特定的数量，可以更容易地在物质的质量和其包含的粒子数量之间进行转换。在实际应用中，阿伏伽德罗常数被广泛应用于制药、材料科学和环境科学等多个领域。例如，在药物配方中，了解每剂量中活性成分的分子数量可以帮助确保药物既有效又安全。同样，在材料科学中，了解给定体积材料中的原子数量可以影响该材料的性质，例如其强度或导电性。此外，阿伏伽德罗常数在理想气体法则中起着重要作用，该法则涉及气体的压力、体积和温度。根据该法则，任何气体的一摩尔在标准温度和压力（STP）下占据22.4升的体积。这种关系对于预测气体在不同条件下的行为至关重要，这在许多科学和工业过程中都很重要。总之，阿伏伽德罗常数是化学的基石，促进了我们对微观世界的理解。它使我们能够将原子和分子的抽象概念转化为可以测量和操作的具体数量。这个数字的影响远远超出了课堂，影响着各个行业和科学研究。通过掌握阿伏伽德罗常数的重要性，我们获得了对物质性质和化学反应规律的宝贵洞察。这种理解不仅在学术上是丰富的，而且在我们日益以科学为驱动的世界中也是实用的。