Question

how is matter conserved? no. of molecules change before and after reaction no. of molecules disappear no. of atoms remain same before and after the reaction matter cannot be conserved after reaction takes place

Explanation:

The law of conservation of matter states that in a chemical reaction, the number of atoms of each element remains the same before and after the reaction. Molecules can change in number and composition during a reaction, but the atoms are conserved. Matter is conserved as the total mass remains constant because the atoms are just rearranged.

Answer:

No. of Atoms remain same before and after the reaction