An unbalanced chemical equation:a. does not obey Conservation of Mass law b. does obey Conservation of Mass law c. has equal numbers of atoms of each element in both reactants and productsd. none of the above

a. Does not obey Conservation of Mass law

Explanation:

An example of an unbalanced chemical equation is:

As you can see, there are two Na atoms on the right side of the equation, while only one on the left side, causing the masses on both sides of the equation to not be equal. In other words, not fulfilling the Conservation of Mass law.

Compare with the correctly balanced equation:

Now both sides of the equation possess the same number of atoms for each element.

in 1783 cavendish was working with his hydrogen gas and found that when he burned it and condensed the vapor it was water. this was very significant since it disproved the greek theory of elements completely since water was not a simple substance but the product of two gases. it was lavoisier who hearing of the experiment gave cavendish's gas the name hydrogen ("water-producer") and added that hydrogen burned by combining with oxygen and that water was a hydrogen-oxygen combination.

explanation: