Jawabanmu

2014-02-04T22:21:54+07:00
a. MnO₄²⁻
Mn = +6
O = -2
b. Cr(OH)⁴⁻ --> seharusnya Cr(OH)₄ atau Cr(OH)⁺⁴
Cr = +4 atau Cr = +5
O = -2
H = +1
c. Na₃PO₄
Na = +1
P = +5
O = -2
d. MgCO₃

Mg = +2
C = +4
O = -2
1 5 1