有些化学计算题用化学方程式进行计算时,难度很大且解题过程繁琐,有的甚至会陷入死胡同,但是若用质量守恒定律解题,以某种元素或微粒在化学反应前后质量不变为突破口,顺藤摸瓜,就可以删繁就简,使问题迎刃而解。 Some chemical calculations with chemical equations calculation, the difficulty is very large and the problem-solving process cumbersome, and some even into a dead end, but if the problem with the law of conservation of mass, with a certain element or particle in the chemical reaction before and after the same quality Breakthrough, follow the example, you can delete simple, so that the problem be solved.