Массовая доля алюминия в сульфате алюминия состовляет ? % (округлите до десятых)
alexanders4234
2
16.09.2019 20:00
0
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1
Mr = 27 * 2 + (32 + 16 * 4) * 3 = 54 + 240 = 294
W (Al) = 54 / 294 = 0.184 = 18.4%
ответ: W (Al) = 18.4%
P.S. W - это омега