【简答题】置换反应的通式可表示为: 请回答下列问题: (1)若甲为黄绿色气体,单质乙能使淀粉溶液变蓝色,则该反应的离子方程式为:____; (2)若过量的单质甲与化合物A发生反应的化学方程式为: 2Al+Fe 2 O 3 Al 2 O 3 +2Fe。该反应可用于焊接铁轨,要除去反应后混合物中剩余的铝粉与生成的Al 2 O 3 所用的试剂是:____; (3)若单质甲是一种常见的金属单质,化合物B是一种磁性黑...
【简答题】Instruction on the tasks.pptx Please summarize your finding and submit the recording as an attachment. Note: You need to record the whole process and the recordings should be submitted as a weekly ass...
【简答题】Please watch the Speech of Leonardo DiCaprio and then consider the following questions . Please record your answer with voice frequency and your answer should not be less than 1 minute. 1.Do you think...