Question

note: to answer some of the questions, it may help to reference a periodic table
refer to the reactant.
$\ce{\\_mgco_{3}\to?}$
what is the completed decomposition reaction?
$\ce{\bigcirc mgco_{3}\to mgo + co_{2}}$
$\ce{\bigcirc 2mgco_{3}\to 2mg + 2c + 3o_{2}}$
$\ce{\bigcirc mgco_{3}\to mg + co_{3}}$
$\ce{\bigcirc mgco_{3}\to 3mg + co}$

Explanation:

Step1: Analyze decomposition reaction

Decomposition reaction of metal carbonate produces metal oxide and carbon dioxide.

Step2: Check each option

• For \(MgCO_{3}\to MgO + CO_{2}\), it follows the rule of metal carbonate decomposition.
• For \(2MgCO_{3}\to 2Mg + 2C + 3O_{2}\), this is not a common decomposition pattern for \(MgCO_{3}\).
• For \(MgCO_{3}\to Mg + CO_{3}\), \(CO_{3}\) is not a stable product in this context.
• For \(MgCO_{3}\to 3Mg + CO\), the stoichiometry and product formation are incorrect.

Answer:

\(MgCO_{3}\to MgO + CO_{2}\)