Answer:
See explanation
Step-by-step explanation:
In order to answer this question, we have to look at the principle of conservation of mass. This principle states mass is neither created nor destroyed in a chemical reaction.
Hence, in a chemical system undergoing a reaction, the total number of atoms present in the system remain the same before and after the reaction. This also implies that the weight of the system does not change.
Thus, the weight of a chemical system does not change after a chemical reaction.