or

12g of Carbon combines with 32g of oxygen to give 44g of carbon dioxide. Which law of stoichiometry is illustrated? And also state the law.


Ans: 
In this reaction, the total mass of reactants is equal to the total mass of the product.

This illustrates the law of conservation of mass which states, "Under similar conditions of temperature and pressure, the total mass of reactants in any chemical reaction is equal to the total mass of product."