Question

Balanced equations illustrate what law? the law of conservation of mass the law of proportional elements the law of coefficients the law of balanced atoms

Answer 1

the law of conservation of mass

Step-by-step explanation:

According to law of conservation of mass we cannot create or destroy matter. During a chemical reaction the matter amount remains the same. The sum of mass of reactants undergoing a reaction will be equal to some of mass of products formed during the reaction.

Now in order to illustrate the same we have to balance a chemical reaction in terms of number of atoms of each elements present in the reactant side and product side.

For example:

If we are writing a reaction of formation of water from hydrogen and oxygen then we have to write it like:

`H_(2)(g)+(1)/(2)O_(2)-->H_(2)O`

Answer 2

Answer is: the law of conservation of mass.

Number of atoms must be the same on left and right side of balanced chemical reaction according to the law of conservation of mass or principle of mass conservation.
For example balanced chemical reaction:
BaCl₂ + H₂SO₄ → BaSO₄ + 2HCl.
There are two hydrogen atoms, one sulfur atom, four oxygen atoms, one barium atom and two chlorine atoms on both side of this chemical reaction.