100g of calcium carbonate was heated until it decomposed to give calcium oxide and carbon dioxide. 56g of calcium oxide was left. Work out the mass of carbon dioxide given off.

Respuesta :

Answer:

CaCO3 = CaO + CO2

Explanation:

need 100g mass on each side

100 g CaCO3 = 56g CO + 44g CO2

The mass of carbon dioxide, COâ‚‚ given off is 44 g

From the law of conservation of matter which states that matter can neither be created nor destroyed during a chemical reaction but can be transferred from one form to another,

we understood that the total mass of a reactant is equal to the total mass of products i.e

Total mass of reactant = Total mass of products

With the above information in mind, we can obtain the mass of carbon dioxide, COâ‚‚ given off as follow:

CaCO₃ —> CaO + CO₂

Mass of CaCO₃ = 100 g

Mass of CaO = 56 g

Mass of COâ‚‚ =?

Total mass of reactant = Total mass of products

Mass of CaCO₃ = mass of CaO + mass of CO₂

100 = 56 + mass of COâ‚‚

Collect like terms

Mass of CO₂ = 100 – 56

Mass of COâ‚‚ = 44 g

Therefore, the mass of carbon dioxide, COâ‚‚ given off is 44 g

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