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题目将一定质量的锌拉投入100克硫酸溶液中，待反应完成后，称量剩余溶液的质量为106．3克。求放出氢气的质量。分析本题所绘的两个数据，都是混合物的质量，显然不能直接代入化学方程式求解。如果仔细审题，挖掘“隐含”条件，巧设未知数，会使计算过程简便。现就本题用三种不
The subject will put a certain amount of zinc into 100 grams of sulfuric acid solution. After the reaction is completed, the remaining solution will weigh 106.3 grams. Demand the quality of hydrogen. The two data drawn in the analysis of this question are the quality of the mixture and obviously cannot be directly substituted into the chemical equations. If you examine the problem carefully and dig “implicit” conditions, you can easily set the unknown and make the calculation process easier. Now there are three kinds of questions on this question.