To determine the mass of excess reactant remaining, we need additional data such as:

1. The quantities of the reactants initially present.
2. The balanced chemical equation for the reaction.
3. The limiting reactant, as determined in Part 1.
4. Any calculated amounts of products and remaining reactants from Part 1.

If you have this information, please provide it, and I can guide you through the calculation. If it is part of the uploaded image or table, let me know so I can extract it and proceed.

Would you like me to extract the relevant data from the image or clarify anything?