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第1章

简介:物质与测量

科学定律和理论
Scientific Laws In science, a law is defined as a...
科学方法
Chemistry is an empirical science. Scientists ofte...
按状态划分物质
Chemistry is the study of matter and the changes i...
按成分划分物质
Matter: Pure Substances and Mixtures According to...
物质的理化性质
The characteristics that enable us to distinguish ...
能量是什么?
The universe is composed of matter in different fo...
测量:标准单位
Every measurement provides three kinds of informat...
测量:导出单位
The International System of Units or SI system, by...
测量误差:精确度和准确度
Scientists typically make repeated measurements of...
测量误差:指示仪表
Counting is the type of measurement that is free f...
测量误差:有效数字
All the digits in a measurement, including the unc...
量纲分析
Dimensional analysis, also known as the factor lab...
设计和全流采样系统(FFS)的使用甲烷排放的量化
使用天然气的继续增加非常规页岩资源的发现和生产的增长。与此同时,天然气行业面临持续的甲烷排放量从审查...
用亚硫酸氢萃取协议分离混合物中的醛和反应性酮
有机化合物的提纯是常规合成作业的重要组成部分。通过生成带电结构将污染物移到水层中的能力提供了利用萃取...

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