a.) Determine how many moles of Ba(OH)2 are required to completely neutralize 0.470 mol of HC2H3O2. Express the number of moles numerically. 

b.) if 0.563 g of copper(II) sulfate is allowed to react with 0.58 g of sodium carbonate, what will be the theoretical mass (in grams) of copper(II) carbonate precipitate formed? Round to the nearest thousandth of a gram. 

c.) If 0.433 g of barium sulfate that was precipitated out of a reaction that had a theoretical yield of 0.572 g. What is the percent yield of barium sulfate? Do not include the percent symbol in your answer. Make sure to have the correct number of significant digits.