Question

A reaction of heating calcium carbonate produces calcium oxide and

carbon dioxide gas. Heat 10.0 g calcium carbonate until no more
carbon dioxide gas is given off. The remaining material has a mass of
5.6 g. What mass of carbon dioxide gas was produced in the reaction?
g

Answer 1

4.4g

Step-by-step explanation:

Given:

Mass of calcium carbonate = 10g

Remaining mass = 5.6g

Unknown:

Mass of carbon dioxide gas produced from the reaction = ?

Solution:

The reaction equation is expressed below;

CaCO₃ → CaO + CO₂

According to the law of matter, matter is neither created nor destroyed in a chemical reaction but transformed from one form to another.

CaCO₃ → CaO + CO₂

CaCO₃ is a solid

CaO is a solid

CO₂ is a gas

CaCO₃ → CaO + CO₂

After the heating, CO₂ is given off;

Mass of CO₂ = Mass of starting CaCO₃ - Mass of CaO

= 10g - 5.6g

= 4.4g