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利用氢气或一氧化碳的还原性设计计算题是中考的一个热点。在氢气或一氧化碳与金属氧化物的反应中,如果已知参加反应的金属氧化物质量(可用字母表示),求生成的金属质量,或知道了反应生成的金属质量(可用字母表示),求参加反应的金属氧化物或氢气(或一氧化碳)的质量(亦可求参加反应的氢气或一氧化碳在标准状况下所占的体积),这样的计算题属于根据化学方程式计算的基本题。如果金属氧化物没有完全反应,给出的是反应前后固体的质量,求参加反应的金属氧化物的质量分数或生成的金属质量,或者氢气(或一氧化碳)跟几
The use of the reductive design of hydrogen or carbon monoxide is a hot topic in the examination. In the reaction of hydrogen or carbon monoxide with metal oxides, if the mass of metal oxides participating in the reaction (known as letters) is known, the mass of the generated metal is known, or the quality of the metal produced by the reaction is known (letters can be used), The mass of the metal oxide or hydrogen (or carbon monoxide) reacted (also the volume of hydrogen or carbon monoxide involved in the reaction under standard conditions) is calculated. This calculation is based on the basic problem of chemical equations. If the metal oxide is not completely reacted, the mass of the solid before and after the reaction is given, and the mass fraction of the metal oxide involved in the reaction or the mass of the generated metal, or hydrogen (or carbon monoxide), is given.