Chemical reaction as part of a science experiment

A) The mass of the product formed in the closed system is 16.5

B) the correct answer is option B.

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.

Part A:

Mass of first reactant = 4.0 g

Mass of second reactant = 12.5 g

Mass of First reactant + Mass of Second reactant → Mass of Product

4.0 g + 12.5 g = Mass of Product

16.5 g = Mass of Product

The mass of the product formed in the closed system is 16.5

Part B:

According to law of conservation of mass, total number of atoms on reactant sides equal to the total number of atoms on the product side.

So, the model representing the same is model in option B.

it is b that is the answer.

the answers are

c and c