Question

Составьте уравнения реакций, определите тип каждой реакции: O2 → H2O → H2 → CaH2

Answer 1

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Answer 2

Balancing Chemical Equations and Reaction Types

To balance the chemical equations and determine the type of each reaction, let's start with the given reactions:

1. O2 → H2O 2. H2O → H2 3. H2 → CaH2

Balancing the Equations

1. O2 → H2O - This is a combustion reaction, where a substance reacts with oxygen to produce heat and light. The unbalanced equation is: ``` O2 → H2O ``` - To balance the equation, we need to add a coefficient of 2 in front of H2O: ``` O2 → 2H2O ```

2. H2O → H2 - This is a decomposition reaction, where a compound breaks down into simpler substances. The unbalanced equation is: ``` H2O → H2 ``` - To balance the equation, we need to add a coefficient of 2 in front of H2O: ``` 2H2O → 2H2 ```

3. H2 → CaH2 - This is a synthesis reaction, where multiple substances combine to form a single compound. The unbalanced equation is: ``` H2 → CaH2 ``` - To balance the equation, we need to add a coefficient of 2 in front of CaH2: ``` H2 → 2CaH2 ```

Types of Reactions

1. O2 → H2O - This is a combustion reaction, as mentioned earlier. Combustion reactions involve the reaction of a substance with oxygen to produce heat and light.

2. H2O → H2 - This is a decomposition reaction. Decomposition reactions involve the breakdown of a compound into simpler substances.

3. H2 → CaH2 - This is a synthesis reaction. Synthesis reactions involve the combination of multiple substances to form a single compound.

In summary, the balanced equations and types of reactions are as follows: 1. O2 → 2H2O (Combustion reaction) 2. 2H2O → 2H2 (Decomposition reaction) 3. H2 → 2CaH2 (Synthesis reaction)