'Hard' water often contains Ca2+ ions, which react with bicarbonate (HC03) when heated to form insoluble CaCO3. What is the maximum mass in grams of CaCO3 that can form when 5.0 g of HCO3- reacts with 2.0 g of Ca2+ ions?

Ca2+ (aq) + 2 HCO3- (aq) - CaCO3 (s) + H20 (l) + CO2 (g)


17. (3 pts) Yeast converts glucose (C6H12O6) into ethanol (C2H5OH) during the process of fermentation, following the reaction given below. If the reaction has an 86.7% yield and 39.45 g of ethanol are obtained, what was the theoretical yield of ethanol?
C6H12O6 (aq) -> 2 C2H5OH (l) + 2 CO2 (g)