Question

please help me balance these

KHCO3=K2CO3+H2O+CO2

C+HNO3(conc.)=CO2+H2O+
NO2

Cu+H2SO4(conc.)=CuSO4+
H2O+SO2​

Answer 1

2KHCO3=K2CO3+H2O+CO2

C+2HNO3(conc.)= CO2+H2O+2NO2

Cu+2H2SO4=CuSO4+2H2O+2SO2

HOPE THIS HELPS

Answer 2

Answer:

2KHCO3=K2CO3+H2O+CO2

C+4HNO3=CO2+2H2O+4NO2

Cu+2H2SO4=CuSO4+2H2O+SO2