Respostas

2014-02-22T12:37:06-03:00
Al2(SO4)3

2 Al  = 2 . 27 = 54u
3 S  = 3 . 32 = 96 u
12 O = 12 . 16 = 192 u

MM =
54u + 96 u + 192 u = 342 g / mol


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