论文部分内容阅读
中学化学计算题牵涉到的数学处理技巧并不太多,但许多化学计算题因题型特殊,倘能相机适时地辅之以一些常规的数学变换技巧,的确也有成倍简化运算量的效果。一、用添项、拆项法例1.由甲烷和另一种或几种气态烃组成的混合气体,其平均分子量为24 2/3,充分燃烧1体积此混合气体恰好需要同温同压下的氧气3体积,试确定此混烃的组分以及各自的体积百分含量。
The mathematics processing skills involved in middle school chemistry calculation problems are not too many, but many chemistry calculation problems because of the special type of questions, if the camera can be timely supplemented with some conventional mathematical transformation skills, it does also have the effect of simplifying the computational complexity. 1. Addition and removal of items 1. The average molecular weight of mixed gas consisting of methane and one or more other gaseous hydrocarbons is 24 2/3. Full combustion of 1 volume of this mixture requires exactly the same temperature and pressure. Oxygen 3 volume, try to determine the components of this mixed hydrocarbon and their respective volume percentages.