What is the pH at the equivalence point in the titration of a 25.5 mL sample of a 0.363 M aqueous hydrocyanic acid solution with a 0.404 M aqueous barium hydroxide solution? pH =

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