Question

Why does change in mass happen

Answer 1

The mass in a chemical reaction is constant in a closed system.

Step-by-step explanation:

It is important to remember that mass changes only occur because a gas is being released into the atmosphere, or because a gas from the atmosphere is being used as a reactant - no atoms are being created or destroyed, just rearranged.

Answer 2

The mass in a chemical reaction is constant in a closed system. ... It is important to remember that mass changes only occur because a gas is being released into the atmosphere, or because a gas from the atmosphere is being used as a reactant - no atoms are being created or destroyed, just rearranged.