Respostas

2014-02-06T21:20:41-02:00
a ) CuSO4

MM (CuSO4) = 63.1 + 32.1 + 16.4 = 63 + 32 + 64 = 159 u
M (CuSO4) = 63.1 + 32.1 + 16.4 = 63 + 32 + 64 = 159 g/mol 

b ) Ba(NO3)2

MM ( 
Ba(NO3)2 ) = 137 + 14 . 2 + 16 . 6 = 261 u 
M ( 
Ba(NO3)2 ) =  137 + 14 . 2 + 16 . 6 = 261 g/mol 
3 5 3