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zhenek [66]
3 years ago
10

Which equation is a decomposition reaction? Li2CO3 Right arrow. Li2O + CO2 Zn + HCl Right arrow. ZnCl2 + H2 Na2O + CO2 Right arr

ow. Na2CO3 C6H12O6 + O2 Right arrow. CO2 + H2O
Chemistry
1 answer:
Dmitrij [34]3 years ago
3 0

Answer:

Li₂CO₃ ⇒ Li₂O + CO₂ is a decomposition reaction.

Explanation:

In a decomposition reaction, a single substance decomposes, producing two or more different substances. In other words, in this type of reaction two or more substances are formed from a compound. The atoms that form a compound separate to give the products according to the formula:

AB → A + B

It can occur spontaneously, or be aided by a catalyst, heat, or electrolysis.

In this case:

Li₂CO₃ ⇒ Li₂O + CO₂ It is a type of chemical reaction in which a single compound decomposes into two or more compounds. So it is a decomposition reaction.

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Answer:

the correct choice would be: 4. Reaction rates are not related to spontaneity.

Explanation:

The speed of reaction is independent of spontaneity, since it depends on other factors such as the amount of reagent.

The amount of reagent is one of the variables that most influences the speed of reaction, the greater the amount of reagent, the faster the reaction will be and thus the speed will be increased.

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balu736 [363]

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at high temperature copper penny will react with oxygen as shown below

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We can say that the reaction between copper and oxygen is an endothermic reaction so the rate of reaction is high at high temperature.

The bond energy of oxygen molecules need energy to react with copper and form copper oxide.

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