a) 2Zn + O2 = 2ZnO
ZnO + 2HCl = ZnCl2 + H2O
b) 2Ba + O2 = 2BaO
BaO + H2O = Ba(OH)2
Ba(OH)2 + H2SO4 = BaSO4 + 2H2O
c) C + O2 = CO2
CaO + CO2 = CaCO3
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Answers & Comments
a) 2Zn + O2 = 2ZnO
ZnO + 2HCl = ZnCl2 + H2O
b) 2Ba + O2 = 2BaO
BaO + H2O = Ba(OH)2
Ba(OH)2 + H2SO4 = BaSO4 + 2H2O
c) C + O2 = CO2
CaO + CO2 = CaCO3