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Challenge Questions: Balance the equations below.
___ NaNO3 + ___ PbO → ___ Pb(NO3)2 + ___ Na2O
___ Ca3P2 + ___ H2O → ___Ca(OH)2 + ___ PH3
___Fe2O3 + ___ CO → ___Fe + ___ CO2
___NH3 + ___ O2 → ___ NO2 + ___ H2O
___FeS + ___O2 → ___Fe2O3 + ___SO2
___ C3H6O2 + ___ O2 → ___ CO2 + ___ H2O

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Answer:

2 NaNO3 + 1 PbO --> 1 Pb(NO3)2 + 1 Na2O

1 Ca3P2 + 6 H2O --> 3 Ca(OH)2 + 2 PH3

1 Fe2O3 + 3 CO --> 2 Fe + 3 CO2

4 NH3 + 7 O2 --> 4 NO2 + 6 H2O

4 FeS + 7 O2 --> 2 Fe2O3 + 4 SO2

2 C3H6O2 + 7 O2 --> 6 CO2 + 6 H2O

Explanation:

balance equations by giving compounds in the reactants and products whole-number coefficients that result in the same number of each element on both sides of the equation

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