For questions 1 - 5, use the following information to answer the questions: Potassium nitrate, KNO3, also known as salt peter or Chinese salt, has been used for approximately 700 years for the manufacture of gun powder and explosives. A solution of KNO3 is prepared by dissolving 60.0 g KNO3 in 100.0 g H2O. The density of the resulting solution is 1.38 g/mL. Calculate the mass % of KNO3 in the solution.

Select the correct value for the indicated bond angle in each of the compounds. o−o−oo−o−o angle of o3 90° 109.5° < 109.5° 120° < 120° 180° f−b−ff−b−f angle of bf3 180° < 109.5° < 120° 120° 109.5° 90° f−o−ff−o−f angle of of2 < 120° 120° 90° 109.5° 180° < 109.5° cl−be−clcl−be−cl angle of becl2 90° 109.5° 180° 120° < 109.5° < 120° f−p−ff−p−f angle of pf3 90° 109.5° < 109.5° 180° 120° < 120° h−c−hh−c−h angle of ch4 90° < 109.5° 180° 120° < 120° 109.5°