Ignore the first two parts, only need help with part c. Thank you.

2. Sodium carbonate, Na2CO3 is used in the manufacturing of glass and is made from calcium carbonate, CaCO3 and sodium chloride, NaCl, according to the following equation: CaCO3+NaClNa2CO3+CaCl2 a) Before starting to answer, think critically about all the steps that you will need to carry out for this type of question and any thing you must consider or calculate. List the steps below. From above, CaCO3+NaClNa2CO3+CaCl2 b) What is the maximum number of grams of Na2CO3(s) that can be formed when 15.0g of CaCO3 reacts with 25.0g of NaCl ? Be sure to show all your work and report answers to the appropriate number of significant digits. c) How much remains in excess? Be sure to show all your work and report answers to the appropriate number of significant digits