Ответ №1
Mr (KMnO4) = Ar (K) + Ar (Mn) + 4 * Ar (O) = 39 + 55 + 64 = 158
w (K) = 39 : 158 = 0,25 * 100% = 25%
w (Mn) = 55 : 158 = 0,35% * 100% = 35%
w (O) = 64 : 158 = 0,4% * 100% = 40%
25 + 35 + 40 = 100%
Ответ №1
Mr (KMnO4) = Ar (K) + Ar (Mn) + 4 * Ar (O) = 39 + 55 + 64 = 158
w (K) = 39 : 158 = 0,25 * 100% = 25%
w (Mn) = 55 : 158 = 0,35% * 100% = 35%
w (O) = 64 : 158 = 0,4% * 100% = 40%
25 + 35 + 40 = 100%
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