State the law of conservation of mass. then apply the law to this question: what would be the total mass of the products of a reaction in which 25 grams of table salt ( sodium chloride) decomposes into the elements sodium and chlorine?

The total mass of the products will be 25 grams.

Explanation:

Law of conservation of mass states that mass can neither be created nor be destroyed but it can only be transformed from one form to another form.  This also means that total mass on the reactant side must be equal to the total mass on the product side.

The chemical equation for the decomposition of sodium chloride follows:

Let the mass of products be 'x' grams

We are given:

Mass of sodium chloride = 25 grams

Total mass on reactant side = 25

Total mass on product side = x

So, by applying law of conservation of mass, we get:

Hence, the total mass of products will be 25 grams

what are the two models

explanation:

2h2o2--> 2h2o + o2

this reaction is of the spontaneous decomposition of hydrogen peroxide down into water and oxygen.

add 2 molecules of hydrogen peroxide and 2 molecules of water. since oxygen is naturally diatomic, the total number of atoms of each element is now the same on both sides of the equation so it is balanced.

this may not be entirely correct but let me know.