QUESTIONS What is the mass percent of chlorine in the compound BaCO3)2? NO UNITS in answer. Writo answer to three significant figures. Periodic table QUESTION 9 What volume in mL) of solution is needed to prepare a 0.9 mols/L solution containing 121 g of barium chloride(MM - 208.33 g/mol)? Write answer to three significant figures. Write answer in decimal format NOT scientific notation. NO UNITS in