According to the law of conservation of matter, which statement about chemical reactions is true?
oa. atoms are created by some reactions and destroyed by others.
ob. atoms cannot be created or destroyed by chemical reactions.
oc. every atom destroyed in a chemical reaction must be replaced.
od. energy is created as atoms are destroyed in chemical reactions,
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B = Atoms can not be created or destroyed by chemical reaction.

Explanation:

Law of conservation of mass:

According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.

Explanation:

This law was given by french chemist  Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.

For example:

In given photosynthesis reaction:

6CO₂ + 6H₂O + energy → C₆H₁₂O₆ + 6O₂

there are six carbon atoms, eighteen oxygen atoms and twelve hydrogen atoms on the both side of equation so this reaction followed the law of conservation of mass.

if the concentration of products is decreased, the equilibrium will shift toward the products). add an inert gas (one that is not involved in the reaction) to the constant-volume reaction mixture: this will increase the total pressure of the system, but will have no effect on the equilibrium condition.

explanation: