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Answer the following questions:
Answer variants:
Fermentation of enzyme
law of conservation of mass
\(AgNO_3\)(aq) + \(NaCl\)(aq) → \(NaNO_3\)(aq)
heat absorption and heat emission
1. State the main difference between endothermic reaction and an exothermic reaction.
2. On what basis is a chemical reaction balanced?
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