论文部分内容阅读
原题］锌粉、铝粉、铁粉、镁粉的混合物ａｇ与一定量的溶质质量分数为２５％的稀硫酸恰好完全反应，蒸发水分后得固体Ｃ（不含结晶水）ｂｇ。求反应过程生成氢气多少克？该题为《１９９８年全国初中学生素质和实验能力竞赛（第八届天原杯）复赛试题》中的第２２题。从表面...
The original title] zinc powder, aluminum powder, iron powder, magnesium powder mixture ag and a certain amount of solute mass fraction of 25% of the dilute sulfuric acid just completely reacted, after evaporation of water to get solid C (excluding crystal water) bg. How many grams of hydrogen should be generated in the reaction process? The title is the 22nd question in the 1998 National junior high school student quality and experimental ability contest (the eighth Tianyuan Cup) semi-finals. From the surface...