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2KMnO4==加熱==K2MnO2 + MnO2 + O2注意氧氣用氣體符號,祝進步
設,製備16克氧氣需要x高錳酸鉀,同時生成y錳酸鉀 2KMnO4 ==加熱==K2MnO4+MnO2+O2↑ 316 197 32 x y 16g 316/32=x/16g x=158g 197/32=y/16g y=98.5g
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