Question

what happens when a chemical reaction takes place?
things stay exactly the same.
new things with different properties are made.
things just get mixed together without changing.
the old things disappear completely.
the reaction 2h₂o → 2h₂ + o₂ is an example of which type of chemical reaction?
neutralization
decomposition
synthesis
combustion
which of the following chemical equations is already balanced?
mg + o₂ → mgo
2kclo₃ → 2kcl + 3o₂
fe + o₂ → fe₂o₃
n₂ + h₂ → nh₃

Explanation:

1. In a chemical reaction, chemical bonds are broken and new bonds are formed, resulting in the creation of new substances with different properties.
2. In a decomposition reaction, a single compound breaks down into two or more simpler substances. In the reaction $2H_2O

ightarrow2H_2 + O_2$, water breaks down into hydrogen and oxygen, which is a decomposition reaction.

1. A balanced chemical equation has the same number of each type of atom on both sides of the equation. For $2KClO_3

ightarrow2KCl + 3O_2$, on the left - hand side, there are 2 potassium (K), 2 chlorine (Cl) and 6 oxygen (O) atoms. On the right - hand side, there are 2 potassium (K), 2 chlorine (Cl) and 6 oxygen (O) atoms.

Answer:

1. New things with different properties are made.
2. Decomposition
3. $2KClO_3

ightarrow2KCl + 3O_2$