Question

CaO → X → CaCO3 → CO2→СО

Answer 1

Відповідь:

Х - СО2

Пояснення:

Answer 2

CaO+H2O = Са(ОН)2
Ca(OH)2+Na2CO3 = CaCO3+2NaOH
CaCO3 = CaO+CO2
2CO2=2CO+O2

Answer 3

The chemical equation you provided seems to describe the process of converting calcium oxide (CaO) into carbon dioxide (CO2) and carbon monoxide (CO) via an intermediate step. Here's a breakdown of the reaction steps:

1. CaO (Calcium Oxide) is subjected to a specific process or treatment (indicated by "X") that results in a chemical transformation.

2. The transformed product from step 1 then reacts with carbon dioxide (CO2) to produce calcium carbonate (CaCO3) as follows: CaO + CO2 → CaCO3

3. Finally, the calcium carbonate (CaCO3) can undergo decomposition upon heating to release carbon dioxide (CO2) and carbon monoxide (CO): CaCO3 → CO2 + CO

Overall, the reaction sequence you provided involves the conversion of calcium oxide (CaO) into calcium carbonate (CaCO3) and subsequently the release of carbon dioxide (CO2) and carbon monoxide (CO) through the decomposition of calcium carbonate.

It's important to note that the intermediate step indicated as "X" could represent various processes depending on the context or specific chemical reaction involved. Without further information, it's challenging to provide more specific details about this step.