Question

A scientist completes a thermal decomposition reaction. 12.25g of calcium carbonate, CaCO3, is heated

and forms calcium oxide, Cao, and carbon dioxide, CO2.
a. Write a balanced chemical equation to demonstrate this reaction. Include state symbols.


b. Calculate the number of moles of calcium carbonate that is thermally decomposed in this
reaction.
Ok

Answer 1

Moles of calcium carbonate : 0.1225

Further explanation

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.

Reaction

CaCO₃(s) → CaO(s) + CO₂(g)

mass of CaCO₃ : 12.25 g

mol CaCO₃(MW=100 g/mol) :

`\tt mol=(mass)/(MW)\\\\mol=(12.25)/(100)\\\\mol=0.1225`