化學功課問題 equation and balance

lead(II)oxide+carbon 有冇reaction ??如有...條文字方程式系咩 ??

At room temperature, there is no reaction between lead(II) oxide + carbon.
When heated, lead(II) oxide reacts with carbon to give lead and carbon dioxide.
The word equation is:
lead(II) oxide + carbon → lead + carbon dioxide
The chemical equation is:
2PbO + C → 2Pb + CO2


平衡 : __KNO3 -->__ KNO2+__O2

2KNO3 → 2KNO2­ + O2


__CaCO3+__HCI-->__CaCI2+__H2O+__CO2

CaCO4 + 2HCl → CaCl2 + H2O + CO2


Cu+4HNO3 --> __Cu(NO3)2+ __NO2+ __H2O

Cu + 4JNO3 → Cu(NO­3)2 + 2NO2 + 2H2O


__CI2+ __ KBr-->__KCI+ __Br2

Cl2 + 2KBr→ 2KCl + Br2

2KNO3 -->2KNO2+O2

CaCO3+2HCI-->CaCI2+H2O+CO2


Cu+4HNO3 --> Cu(NO3)2+ 2NO2+ 2H2O

CI2+ 2 KBr-->2KCI+ Br2