6. 20 g of 40% pure CaCO3 is reacted with 5 g of HCl to produce CaCl₂, H₂O and CO₂. a. Find which one is limiting reactant and why? b. Calculate mass of CaCl₂ formed. C. How many number of water molecules are produced? d. Calculate the volume of CO₂ produced at 27°C and 0.5 atm pressure.