Ответ:
+4-2
SiO₂
+1-1
KCl
+1 +4 -2
H₂SiO₃
Na₂CO₃
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Ответ:
+4-2
SiO₂
+1-1
KCl
+1 +4 -2
H₂SiO₃
+1 +4 -2
Na₂CO₃