+n2@"HH(EG(HH(d'`xxxx"L6Q`"3 DETERMINATION OF CHEMICAL FORMULA BY ANALYSIS " " "J1. A 0.537 G sample of an organic compound containing only carbon,hydrogen`"c and oxygen was burned in air to produce 1.030 g CO @2 and 0.632 g H @2 O. What "+ is the empirical formula of this compound? " " " ""I2. A 1.500 g sample of a compound composed of chromium and chlorine was `"Y dissolved in water and allowed to react with AgNO @3 . This converted all the "D chlorine in the original sample into AgCl, which was collected and " found to weigh 4.072 g. " "C a. How many grams of Cl are in the AgCl obtained in this analysis? " "D b. How many grams of Cr and Cl were in the original 1.500 g sample? " "D c. What is the empirical formula of the chromium chlorine compound? " " ""M3. A 1.35 g sample of a substance containing carbon, hydrogen, nitrogen and `"b oxygen was burned to produce 0.810 g H @2 O and 1.32 g CO @2 . In a separate "H reaction, all the nitrogen in 0.735 g of the substance was converted to`"Q ammonia. This gave 0.284 g of NH @3 . Determine the empirical formula " of the substance. " " " "J4. An organic compound was synthesized and a sample of it was analyzed and "O found to contain only C, H, N, O and Cl. It was observed that when a 0.150 g `"W sample of the compound was burned, it produced 0.138 g of CO @2  and 0.0566 g`"X of H @2 O. All the nitrogen in a different 0.200 g sample of the compound was`"X converted to NH @3 , which was found to weigh 0.0238 g. Finally, the chlorine "I in a 0.125 g sample of the compound was converted to Cl- and by reacting`"Y it with AgNO @3 , all the chlorine was recovered as AgCl. The AgCl, when dried " was found to weigh 0.251 g. " "A a. Calculate the weight percent of each element in the compound. " "4 b. Determine the empirical formula of the compound. "H5. Citric acid, the substance that makes lemon juice sour,is composed of "H only C, H and O. When a 0.5000 g sample of citric acid was burned, it`"] produced 0.6871 g of CO @2 and 0.1874 g of H @2 O. The molecular mass of "= the compound is 192. Determine the empirical and molecular " formulas.