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chemestry please check my anwers.

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1.How do acid-base reactions differ from oxidation-reduction (or "redox") reactions?

Acid-base reactions involve an exchange of protons whereas redox reactions involve an exchange of electrons.<<<

Acid-base reactions and redox reactions involve different processes and have nothing in common.

2.Why does a battery that has thick zinc walls last longer than one that has thin zinc walls?

Thick zinc walls prevent the battery from over heating.

The zinc walls are transformed into zinc ions as the battery provides electricity<<<<

3.Why are combustion reactions generally exothermic?

Hydrogen easily pulls electrons from the oxygen in water molecules and are reduced.

Combustion involves the transfer of electrons to oxygen, which has an extremely high tendency for gaining electrons.<<<?? maybe

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