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什么是奇偶数配平法

更新时间: 2020-09-17 00:00:00     

1、先观察等号两端的化学式中有没有同一元素的原子个数出现了奇数与偶数。2、选择出现最大奇数的化学式,在该化学式前面加系数。3、最后观察配平。

关键词: 什么 偶数

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