balance the following equation: na₂co₃ + hcl → nacl + h₂o + co₂ your answer classify the reaction: 2kclo₃ → 2kcl + 3o₂ your answer classify the reaction: fe + cuso₄ → feso₄ + cu your answer classify the reaction: 2naoh + co₂ → na₂co₃ + h₂o your answer

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# Explanation:
## Step1: Balance the first equation
Start with sodium ($Na$): On the left, there are $2$ $Na$ atoms in $Na_{2}CO_{3}$. On the right, there is $1$ $Na$ atom in $NaCl$. So, put a coefficient of $2$ in front of $NaCl$. Now for chlorine ($Cl$): There is $1$ $Cl$ atom in $HCl$ and $2$ $Cl$ atoms in $2NaCl$, so put a coefficient of $2$ in front of $HCl$. Check other elements: Carbon ($C$) has $1$ atom on both sides, oxygen ($O$) has $3 + 2=5$ on the left ($3$ in $Na_{2}CO_{3}$ and $2$ from $2HCl$’s oxygen contribution considering the products) and $1 + 2 = 3$ from $H_{2}O$ and $CO_{2}$ (after balancing) which is correct. The balanced equation is $Na_{2}CO_{3}+2HCl = 2NaCl + H_{2}O+CO_{2}$.
## Step2: Classify the second reaction
In $2KClO_{3}\to2KCl + 3O_{2}$, one compound ($KClO_{3}$) breaks down into two simpler substances ($KCl$ and $O_{2}$). This is a decomposition reaction.
## Step3: Classify the third reaction
In $Fe+CuSO_{4}\to FeSO_{4}+Cu$, iron ($Fe$) replaces copper ($Cu$) in $CuSO_{4}$. According to the single - replacement reaction definition (a reaction where one element replaces another element in a compound), this is a single - replacement reaction.
## Step4: Classify the fourth reaction
In $2NaOH + CO_{2}\to Na_{2}CO_{3}+H_{2}O$, $CO_{2}$ (an acidic oxide) reacts with $NaOH$ (a base) to form a salt ($Na_{2}CO_{3}$) and water ($H_{2}O$). This is an acid - base (or more precisely, a reaction between a base and an acidic oxide) reaction, which can also be seen as a synthesis reaction in a broader sense (two substances combine to form a more complex substance, but the acid - base nature is more specific here. However, if we consider basic classification, it can be seen as a type of synthesis where non - metal oxide reacts with base).

# Answer:
1. $Na_{2}CO_{3}+2HCl = 2NaCl + H_{2}O+CO_{2}$
2. Decomposition reaction
3. Single - replacement reaction
4. Acid - base reaction (or reaction between a base and an acidic oxide)

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Question

Explanation:

Step1: Balance the first equation

Step2: Classify the second reaction

Step3: Classify the third reaction

Step4: Classify the fourth reaction

Answer: