What will weigh more when a chemical change is complete? The reactants before the
chemical reaction, or the product after the reaction is complete?

A.The reactant will
weigh more than
the product

B. They both will loose
mass after the
reaction

C. They both will weigh
the same

D.The product always
weighs more than
the reactant

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When a chemical change is complete the reactants before the chemical reaction and the products after the chemical reaction will weigh the same.

Explanation:

The law of conservation of mass states that 'in a chemical reaction, mass can neither be created nor be destroyed.
In accordance with this law, the total mass of reactants before the chemical reaction is equal to the total mass of the products after the chemical reaction.
In chemical reaction mass of the reactants and products remains conserved.
The number of atoms on the reactant side is always equal to the number of atoms on the product side.

So, from this, we can conclude that when a chemical change is complete the reactants before the chemical reaction and the products after the chemical reaction will weigh the same.

Learn more about the 'law of conservation of mass' here:

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