5. In order to properly balance a reaction you need to have the same amount of reactants and producs, on both sides. In the question we have the reaction:
PbO2 -> PbO + O2, which will be properly balanced by adding the following stoichiometric coefficients:
2 PbO2 -> 2 PbO + O2, therefore the balancing from the question is False
False
6. This reaction is one example of decomposition reaction, where a compound will be decomposed into two or more molecules or elements
Letter C