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B) 1.7 C) 12.0 D) 123 E) 7.0 6) The normal boiling point of isooctane (CxH18), a gasoline component, is 99.2 C and its enthalpy of vaporization is 35.76 kJ/mol. What is the vapor pressure of isooctane at 25 C? A) 90.2 mmHg B) 65.6 mm Hg C) 42.9 mmHg D) 130.2 mmHg E) 30.1 mmHg 7) Li metal has a body centered cubic (bec) structure. Its density is 0.53 g/cm and its atomic mass is 6.94 g/mol. Calculate the edge length of the unit cell of Li metal. B) 351.6 pm A) 153.6 pm C) 527.4 pm D) 263.7 pm E) 410.3 pm 8) What is the molarity of sodium chloride in 10 L solution that is 13.0% sodium chloride by mass and that has a density of 1.10 g/mL? Na B.Sci 160 H) A) 1.43x10-2 B) 1.43 C) 2.23 D) 2.45 E) 2.56 9) On a clear dav at sea level, with a temperature of 25C. the partial pressure of N, in air is 0.78 atm and the concentration of TU 5C Hafif yamur Casper