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20 12 a question in the second set of simulation questions in the chemistry part of senior three in Fengtai District.
(1) The solid volume is small, the carrying capacity is large, and it is convenient. It is also convenient to produce hydrogen with calcium hydride, and the utilization rate is high.

(2) water removal; Tail gas treatment; Clear the air in the test tube to prevent it from reacting with calcium;

(3) anhydrous copper sulfate;

(4) 1342

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