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2 4 3
____________________ Mn2O7 ? ____________________ MnO2 + ____________________ O 2
2 3 2 6
____________________ Sb + ____________________ HCl ? ____________________ SbCl3 + ____________________ H 2
2 3 2 2
____________________ PbS + ____________________ O2 ? ____________________ PbO + ____________________ SO 2
2 6 3
____________________ Fe ( OH ) ____________________ + 3 H2SO4 ? Fe2 ( SO4 ) 3 + ____________________ H2 O
2 2
____________________ SO3 ? ____________________ SO2 + O 2
3
CH4 + H2O ? CO + ____________________ H 2
2 2
C2H4 + 3 O2 ? ____________________ CO2 + ____________________ H2 O
6 4 5 6
____________________ N2 + ____________________ H2O ? ____________________ NH3 + ____________________ N O
2
2 Al + N2 ? > ____________________ Al N
4 2
PbCl4 + ____________________ H2O ? > PbO2 + ____________________ HC l