1- How many grams of NaOH are contained in 270.0 mL of a 0.850 M sodium hydroxide solution? 2- calculate the moles and grams (a) 3.5 L of 0.57 M NaCl mol ? g ? (b) 3.8 ? 102 mL of 1.8 M KNO3 mol ? g ? (c) 210 mL of 0.46 M CaCl2 mol ? g ? (d) 4.4 L of 0.26 M Na2SO4 mol ? g ? 3- find the molarity (a) 2.8 mol KCl in 450 mL of solution (b) 0.61 mol MgCl2 in 1.5 L solution 4- The calcium carbonate in limestone reacts with HCl to produce a calcium chloride solution and carbon dioxide gas. CaCO3(s) + 2 HCl(aq)