Question

Answer this.
Answer this.
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Answer 1

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Answer 2

Answer:

1. Chemical reaction, a process in which one or more substances, the reactants, are converted to one or more different substances, the products. ... A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products.

2. combination reactions are exothermic in nature. Combination reactions involve the formation of new bonds and this process releases a large amount of energy in the form of heat.

3. Chemical reaction, a process in which one or more substances, the reactants, are converted to one or more different substances, the products. Substances are either chemical elements or compounds. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products.

4. CaO(s) + H2O (l) → Ca(OH)2(s) This reaction occurs when water is added to dry portland cement to make concrete, and heat evolution of energy as heat is evident because the mixture becomes warm. Not all reactions are exothermic (or exoergic).

5. Formed by the reaction of sulfur dioxide and oxygen in the presence of catalysts, sulfur trioxide fumes vigorously in contact with moist air and dissolves in water, liberating much heat and forming sulfuric acid. Solutions of the trioxide in sulfuric acid are called fuming sulfuric acid, or oleum.

6. Silver chloride undergo decomposition reaction in the presence of sunlight to form silver and chlorine.

7. The rate of reaction can be increased using a catalyst , manganese(IV) oxide. When manganese(IV) oxide is added to hydrogen peroxide, bubbles of oxygen are given off. To make oxygen in the laboratory, hydrogen peroxide is poured into a conical flask containing some manganese(IV) oxide.

Step-by-step explanation:

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