A 40-mL VOA vial is 40%-filled with water contaminated with toluene, C6H5CH3, (T = 20 oC; Henry's constant = 0.28 (dimensionless)). The toluene concentration in the liquid is 2 mg/L. Determine: (1) the concentration of toluene in the head space (in ppmV), and (2) the percentage of total toluene mass in the aqueous phase.

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°