Which equation obeys the law of conservation of mass? 2fe + 3o2 → 2fe2o3 4fe + o2 → 2fe2o3 fe + o2 → fe2o2 4fe + 3o2 → 2fe2o3

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

Synthesis reaction is a chemical reaction in which two reactants are combining to form one product.

The chemical equation for synthesis of from and is:

in theory, limestone is composed principally of the compound calcium carbonate - caco3, but in reality this compound is deposited in conditions involving a number of other compounds as impurities so it ends up being a mixture of many compounds.

hope this : -)

tony (lordcaos066)