Question

Total mass is conserved in a chemical reaction because​

Answer 1

Explanation:

that when a chemical reaction absorbs energy, and therefore gains mass, it's not like electrons are created. The extra mass is not caused by the appearance of new particles. Rather, the extra mass is held in the system as a whole......

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Answer 2

Answer:

This means that the total mass and energy before a reaction in a closed system equals the total mass and energy after the reaction. ... Mass is therefore never conserved because a little of it turns into energy (or a little energy turns into mass) in every reaction. But mass+energy is always conserved.