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Energy may only be transformed from one sort to another. Mass is a form of Energy and as such, must be, and is, conserved.

It is 'of no surprise' then, that the number of atoms that enter a chemical reaction is equal to the number of atoms that exist after the reaction has been completed.

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13y ago
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12y ago

Because no substances can be gained or lost.

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11y ago

what goes in must come out.

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Q: Why do reactants in a chemical reaction weigh exactly the same as different products at the end of a reaction?
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Related questions

What are substance you start with in a chemical reaction called?

The reactants


What shows the relationship between the reactants and products in a chemical reaction?

the coefficients of a balanced reaction


How do the reactants of a chemical reaction differ from the products of the same reaction?

They contain different combinations of particles.


What is reactants in science?

A chemical that undergoes a chemical reaction is called a reactant. The chemicals that are produced by a chemical reaction are called the products. So in a chemical reaction, reactants turn into products.


How are reactants converted to products in an elementary reaction?

A product of a chemical reaction is the substance that is formed.


In chemical reaction the products are?

reactants


What are the reactants and the products of the forward Left to right reaction?

Reactants- The substances used up in a reaction. Products- The new substances made.


Where are the reactants and products identified in a chemical reaction?

Reactants are to left and products are to right.


What are the reactants and the products of a written chemical reaction?

reactants are on the left and the products are on the right


What turns on a chemical reaction?

In a chemical reaction reactants are transformed in products.


A reaction that can be made to go either direction from reactants to products or from products to reactants is called an?

Chemical Reaction


A chemical reaction takes place when what?

The atoms of the reactants are rearranged to form new products that are different in chemical composition and properties from those of the reactants.