The law mass conservation cannot be true since the mass of the crucible and contents is less after heating each solid than before. Is this a true statement?

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David · Accepted Answer

This is not a true statement. One needs to be careful in determining the mass of all substances used in the
reaction. The total mass of the crucible and its contents is
less after heating than before because some of it becomes vaporized from heating.

The law mass conservation cannot be true since the mass of the crucible and contents is less after heating each solid than before. Is this a true statement?

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