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所在平台: Udemy |
课程主页: https://www.udemy.com/course/1-atoms-molecules-and-stoichiometry-as-level-9701/
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本课程是剑桥国际AS Level化学（9701）系列课程的第一部分，旨在帮助学生深入理解“原子、分子与化学计量”这一核心章节，特别适合备考剑桥国际AS Level化学考试的学生。 课程将详细、分步地讲解以下知识点： * **1.1 原子和分子的相对质量**：涵盖四种相对质量的概念：相对原子质量、相对分子质量、相对同位素质量和相对离子式质量。 * **1.2 摩尔与阿伏伽德罗常数**：解释摩尔的定义及其与质量的关系，并给出相关计算公式。 * **1.3 相对原子质量（Ar）的测定**： * a) 介绍质谱仪在测量元素同位素质量中的应用。 * b) 讲解如何根据同位素的相对丰度或质谱图计算元素的相对原子质量，并通过实例演示计算过程。 * **1.4 经验式和分子式的计算**：定义经验式和分子式，并详细讲解如何进行经验式的计算，帮助学生掌握考试中常见的题型。 * **1.5 反应物质量以及溶液和气体的体积计算**：讲解计算气体和液体中摩尔数所需的方程。 本课程将通过清晰的讲解和实例分析，帮助学生扎实掌握AS Level化学第一章节的知识，为后续学习打下坚实基础。
The purpose of this course is to help those students in understanding AS Level Chemistry and is especially designed for those students preparing for International Cambridge AS Level Chemistry Examinations. The code this course follows is 9701.This course will follow the Cambridge International AS Level syllabus, In this course, everything will be explained in detail step by step, so students can easily understand about the first part of the AS syllabus that is Atoms, molecules and stoichiometry.This course will consist of the following learning outcomes:1.1 Relative masses of atoms and molecules- relative masses are divided into four categories that are relative atomic mass, relative molecular mass, relative isotopic mass, relative formula mass.1.2 The mole and the Avogadro constant- definition of the mole and the equation of the mole with correlation with mass will be explained.1.3 The determination of relative atomic masses,(Ar)- a) To measure the mass of each isotope present in an element that is mass spectrometer will be explained b) Calculate the relative atomic mass of an element given the relative abundance of its isotopes, or its mass spectrum- some examples will be explained to how to find the relative atomic mass given you have the mass of the isotope and relative percentage isotopic abundance of each isotope.1.4 The calculation of empirical and molecular formulae- definition of empirical and molecular formulae will be explained. Calculations where empirical formula can calculated will be explained to detail, so students can get the idea at what type of questions are usually asked in the examination.1.5 Reacting masses and volumes of solutions and gases- Equations to calculate number of moles in gas and in a liquid will be explained.
