Chemical reaction:
![CaCO_{3}→CaO + CO_{2}](/tpl/images/2614/6098/03077.png)
Molar mass of;CaCO3 = 100gCaO = 56gCO2= 44gAccording to law of conservation of mass:
Mass of CaCO3 = Mass of CaO+Mass of CO2
56g of CaO is obtained from decomposition of 100g of CaCO3.
So,
1.4g of CaO is obtained from decomposition of ↴
![(100 \times 1.4) \div 56 = 2.5g](/tpl/images/2614/6098/d0a74.png)
Mass of CO2
![2.5 - 1.4 = 1.1g](/tpl/images/2614/6098/3e918.png)
Therefore, The mass of CaO is 2.5g and mass of CO2 is 1.1g respectively!