Which molecule is polar A CO 2 B SF 6 C BCl 3 D SF 4 14 Which of the following

Which molecule is polar a co 2 b sf 6 c bcl 3 d sf 4

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13. Which molecule is polar? (A) CO2(B) SF6(C) BCl3(D) SF4 14. Which of the following sets have correctly matched each molecule or ion and its geometry? Tetrahedral Trigonal Pyramidal T-shaped Square Planar 15. Which Lewis structure is correct? 16. The Lewis structure for dimethyformamide (a useful solvent) is shown below:
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How many C and N atoms are sp3, sp2, and sp hybridized? 17. Consider the reaction 2 Al(s) + 3 Cl2(g) ---> 2 AlCl3(s). What volume of chlorine at STP reacts with 324 g of aluminum? 18. How many liters of H2(g) at 273 °C and 200 torr can be obtained form the reaction of 500 g of zinc with excess hydrochloric acid? (A) 5.12 L (B) 343 L (C) 650 L (D) 1300 L 19. What is the concentration of a solution prepared by dissolving 4.20 grams of NaF in 500 grams of water? 20. 10.24 mL of 0.568 M Al(NO3)3is mixed with 3.12 mL, of 4.16 M NaOH. How much solid Al(OH)3could be formed?
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21. The standard heat of formation of ammonia gas is -46.1 kJ mol¯1. How much heat will be produced when 3.04 gram of N2reacts with 6.04 g of H2? 22. At 25 °C and 1 atm, the densities of neon and krypton are 0.82 and 3.42 grams/liter, respectively. The density of argon at the same temperature and pressure is estimated to be (A) 2.12 g/L (B) 2.60 g/L (C) 2.80 g/L (D) 4.17 g/L 23. When the hydrocarbon propane is burned in air, carbon dioxide and water are formed as in the equation C3H8(g) + 5 O2(g) ---> 3 CO2(g) + 4 H2O(l) If 0.100 mol of CO2is produced, how many drops of water will be formed, assuming one drop is 0.05 cm3and contains 1.70 x 1021water molecules? 24. According to the kinetic molecular theory of gases, the Kelvin temperature of a gas is directly proportional to 25. Which is the most viscous at 20 °C and 1.00 atm?
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26. In the van der Waals equation given below, [P + a (n/V)2] (V - nb) = nRT, the a(n/V)2and - nb terms represent, respectively, corrections for (A) derivations in the pressure and the temperature. (B) intermolecular attractive forces and inelastic collisions. (C) intermolecular attractive forces and molecular volumes (D) intermolecular repulsive forces and high temperatures.
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  • Spring '08
  • rogers
  • Chemistry, pH, Sodium hydroxide

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