Respostas

2014-05-30T16:28:17-03:00
Co = 59g
N = 14g
H = 1g
Co(NH2)2 = 91g
2014-05-30T16:51:20-03:00
Co(NH2)2= 12+16+2x (14+2x1)
= 28+32= 60 g/mol
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