What volume of carbon dioxide gas is produced at NTP when 20gram of 20percent pure caco3 is completely heated

1 answer

How much CaCO3 do you have? That's 20 g x (1.00 - 0.20) = 16
CaCO3 ==> CaO + CO2
mols CaCO3 = 16/molar mass CaCO3 = ?
mols CaCO3 = mols CO2 from the equation.
mols CO2 x 24 L/mol @ NTP.
OR you can use 22.4 L/mol @ STP and convert to NTP by correcting for the T from 273.15K to 293.15 K. I have estimated the 24 number above.
Post your work if you get stuck.