Question

What moles of co2 will be obtained when 20gm of caco3 is heated?

Answer 1

Number of moles in 20 grams of CaCO3= given mass/molecular mass

= 20/100

= 0.2 moles

The chemical equation involved in the above question is

CaCO3 -------> CaO + CO2

It means 1 mole of CaCO3 on decomposition gives 1 mole of CaO along with 1 mole of CO2.

Thus, 0.2 moles of CaCO3 gives 0.2 moles of CO2.

Hope it helps!!

Answer 2

Hope this would help

Answer:0.2 moles

Explanation:

Caco3---->cao+co2

According to the above reaction

1 mole of caco3 gives 1 mole of co2 or 100g of caco3 gives 44 g of co2 on heating. Now

20 g caco3 will give 44÷100×20=8.8g co2

Now

1 mole of co2 =44g

8.8g co2 = 1÷44×8.8=0.2 moles