1992 National Test1. Assuming a diamond is pure carbon, how many carbon atoms are present in a 1.75 carat diamond? 1 carat = 200 mg.(A) 4.38 x 1017(B) 5.71 x 1021(C) 1.75 x 1022(D) 2.11 x 10232. Elemental analysis results obtained for cortisone, an anti-inflammatory agent, are: 69.98% C, 7.83% H , and 22.19% O. What is the empirical formula of cortisone?3. How many grams of SO2can be produced from 15 g of CS2by complete combustion in oxygen?CS2+ 3 O2---> CO2+ 2 SO24. How many grams of zinc completely react with 50.0 mL of 0.0600 M HCl?Zn(s) + 2 HCl(aq) ---> ZnCl2(aq) + H2(g)5. Consider the reaction2 MoCl5+ 5 Na2S ----> 2 MoS2+ 10 NaCl + SHow many electrons are involved in each half-reaction for each atom of elemental sulfur that is produced?(A) 1(B) 2(C) 3(D) 46. What volume of CO2at 20 °C and 700. mmHg must be added to a 500. mL container containing N2at 25 °C and 600. mmHg to give a mixture of gases having a pressure of 900. mmHg at 20 °C?7. Hydrogen gas reduces Ag2O to silver metal and forms steamin the process. How many liters of H2O(g) are produced at 125°C and 1.0 atm pressure when 1.0 g of Ag2O is reduced by hydrogen gas?8. Which of the following gases would be expected to deviate the most from ideal gas behavior?9. What is the ratio of the rates of effusion of H2O(g) to D2O(g)? (D = the 1-H-2 isotope of hydrogen)(A) 0.900(B) 0.950(C) 1.05(D) 1.1110. What formula would be expected for a binary compound formed between strontium and nitrogen?11. Coke is utilized in the manufacture of iron from its ore. What is the purpose of the coke?12. Calcium carbonate, obtained from limestone, would NOT be found in which of the following products?13. Ionic compounds are NOT usually characterized by:(A) relatively high heats of fusion and melting points.(B) conductivity of the melt.(C) conductivity of the solution if the compound is soluble.(D) random arrangements of ions, resulting in amorphous solids.14. Which list is arranged in order of increasing atomic size?
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- Atom, Sodium chloride, Sulfuric acid