Question

to get 5.6liters of co2 at STP the weight of caco3to be decompose is

Answer 1

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

1mole of CaCO3 gives 1mole of CO2,

But,

Given volume of CO2 is 5.6lts

1mole gas has a volume of 22.4ltrs

So, 0.25 moles of gas has 5.6lts

So it 0.25moles of CaCO3 is required to decompose,

So 1mole weighs 100gms

Then 0.25moles weighs

=> 25grams