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Galanalexandra
a fost răspuns

Stabiliti coeficientii va rog pentru urmatoarele reactii chimice:
NO + 02 - NO2
CaO + H3PO4 - Ca3(PO4)2 + H2O
K+ H2O - KOH + H2
FeCl3 _ KOH - Fe(OH)3 + KCl
Al + S - Al2S3

Răspuns :

N(+1)O(-1) + O2(0) = N(+2)O2(-1)
Ca(+2)O(-2) + H3(+1)P(+5)O4(-2) = Ca3(+2)[P(+5)o4(-2)](-3)2 + H2(+1)O(-2)
K(0) + H2(+1)O(-2) = K(+1)O(-2)H(+1) + H2(0)
Fe(+3)Cl3(-1) + K(+1)O(-1)H(+1) = Fe(+3)[(O(+2)H(+1))]3(-1) + K(+1)Cl(-1)
Al(0) + S(0) = Al2(+3)S3(-2)