Answer:
4.4g
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
