Jawabanmu

2014-03-20T19:27:28+07:00
Mr Fe₂O₃.7H₂O
Mr = ((2xFe)+(3xO)+(7x2xH)+(1xO))
     = (2X56)+(3x16)+(14x1)+(1x16)
     = (112+48+14+16) g/mol
     = 190 g/mol










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