Final answer:
The ending mass is predicted to be 322g based on the law of conservation of mass in chemical reactions.
Step-by-step explanation:
In the experiment mentioned, the starting mass is given as 322g. According to the law of conservation of mass in chemical reactions, the total mass at the start of the reaction is equal to the total mass at the end of the reaction. Thus, we can predict that the ending mass will also be 322g. This is because mass is neither created nor destroyed in a chemical reaction, only rearranged.