What mass of calcium oxide and what volume of carbon dioxide can be obtained from the decomposition of calcium

What mass of calcium oxide and what volume of carbon dioxide can be obtained from the decomposition of calcium carbonate weighing 250 g by the reaction: CaCO3 = CaO + CO2

The thermal decomposition of calcium carbonate is described by the equation:
CaCO3 = CaO + CO2 ↑;
amount of calcium carbonate
M CaCO3 = 40 + 12 + 16 x 3 = 100 grams / mol;
N CaCO3 = 250/100 = 2.5 mol;
The same molar amounts of calcium oxide and carbon dioxide can theoretically be obtained.
To find its volume, you need to multiply the amount of substance by the volume of 1 mole of gas (which is 22.4 liters).
V CO2 = 2.5 x 22.4 = 56 liters;
Let’s calculate the mass of calcium oxide.
M CaO = 40 + 16 = 56 grams / mol;
m CaO = 56 x 2.5 = 140 grams;