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Molecules are combinations of multiple atoms. In a chemical reaction, the bonds between the atoms are broken and new ones form, usually with a lower amount of energy than when they started. In a reaction such as synthesis of hydrogen (H2) and Oxygen (O2) to form water (H2O), the formula would look like this-

2(H2)+(O2)=2(H2O). there are there are three molecules on the left and two on the right. however the number of atoms are the same.

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13y ago
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1d ago

In a chemical equation, the number of atoms is conserved because atoms cannot be created or destroyed during a chemical reaction due to the law of conservation of mass. However, the number of molecules is not necessarily conserved because molecules can be broken apart or formed during a reaction, resulting in a change in the number of molecules involved.

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Q: Why the the number of atoms conserved but the number of molecules is not in a chemical equation?
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What is conserved when one balances a chemical equation?

When balancing a chemical equation, the number of each type of atom on the reactant side must be equal to the number of each type of atom on the product side. Mass and charge are conserved during a chemical reaction as well.


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According to the Law of Conservation Of Mass,Matter is neither created nor destroyed.It means a chemical equation show that matter is always conserved in a chemical reaction.It is shown as number of atoms both sides of the reaction before and after remains the same.


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The number of molecules of the specific compound.


In a chemical equation can you count the number of molecules?

Only if you know how many moles there are.


The coeficients in a chemical equation indicate?

The coefficients in a chemical equation indicate the relative number of moles of each reactant and product involved in the reaction. They are used to balance the equation so that the law of conservation of mass is upheld, ensuring that atoms are neither created nor destroyed during a chemical reaction.


A number placed in front of a chemical formula in a chemical equation is called?

In a chemical Equation ,The reactants are on the left side of a chemical equation and the products are on the right side.The number in front of a chemical formula in a chemical equation is called atoms. They should be a balancing number on both the sides.


What general terms does a chemical equation indicate?

Chemical formulas of reactants and products; number of molecules involved in the reaction.


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This depends on each chemical reaction.


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This is the number of molecules or atoms involved in the reaction.


How does a balanced chemical equation shows that mass is conserved?

A balanced chemical equation shows that mass is conserved because the total mass of the reactants before a chemical reaction must equal the total mass of the products after the reaction. This is achieved by ensuring that the number of atoms of each element is the same on both sides of the equation. Therefore, what is consumed on the reactant side is equal to what is produced on the product side, preserving total mass.


What information In a balanced chemical equation shows how many moles of a reactant are involved in the reactant?

In a balanced chemical equation the number of molecules or atoms are specified.


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