Chemistry Question

nfifeeqgdn2022-10-04 11:39:542条回答

Chemistry Question
1.一般电池的正负极是用__(填名称,下同)制作的,正极是用__制作的.
我的答案是锌筒;铜帽.但是解析上写的是锌筒;石墨.为什么是石墨?到底哪个答案正确?
2.糖果、烟盒中的包装纸是用金属__制作的.
我填的是锡,但答案上说的是铝.为什么是铝?难道包装纸分两种类型?

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共2条回复
EVA917 共回答了29个问题 | 采纳率96.6%
1.铜这么贵 一般干电池都不可能啦.一般电池嘛,通常都是锌做负极的,石墨做正极,石墨可导电,因为锌的活泼性比石墨好,因此做负极...
答案是正确的
2.铝箔衬纸
铝箔衬纸:包括真空镀铝纸.把纸和铝箔用粘合剂复合在一起,制成衬纸.多用于香烟、糖果等包装.
有这么一种纸张
另外 铝在自然界的含量比锡高 便宜
锡遇冷会碎成粉末
1年前
dageuo2006 共回答了36个问题 | 采纳率
1
你所说的铜帽是电池的外部构造,而电池的化学本质是原电池,原电池的正极当然要用惰性电极,针对普通干电池而言,电池内部提供电能的正极是碳棒,即石墨
2
现在包装纸大多用的是铝箔,锡可不便宜
1年前

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qingrenyf11年前2
xiaoge4188 共回答了18个问题 | 采纳率94.4%
a The force of molecules in objects consists of attractive force and repulsive force depends on distance between each other.Molecules of gases have much farther distance than those of solids.So the molecules of gases attract each other and this makes gas compressed easily.
b Liquid has larger distance between molecules than solid.When heated,Molecules of liquid moves more violently than those of solid.Larger space makes movements more obvious.