Which region in the IR spectrum could be used to distinguish between butanoic acid and 2-butanone? 1680-1750 cm-1 3200-3600 cm-1 2500-3300 cm-1 1600 cm-1

8) a mixture of he, ne and ar has a pressure of 7.85 atm. if the ne has a mole fraction of 0.47 and 8) ar has a mole fraction of 0.23, what is the pressure of he? a) 4.2 atm b) 3.7 atm c) 5.5 atm d) 2.4 atm e) 1.8 atm