5. When performing a titration, a student adds three drops of phenolphthalein to a flask containing 40.1 mL of HCl. Using a buret, the student slowly adds 2 M NaOH to the flask until one drop causes the
indicator to turn light pink. The student determines that a total volume of 24.2 mL of NaOH was used
in this titration. Calculate the molarity of the HCl used in the titration. (2p)

How does a sample of helium at 15 degree celsius compare to a sample of helium at 215 k? a) the helium at 15 degrees celsius has a higher average kinetic energy that the sample at 215 k. b) the helium at 15 degrees celsius has lower nuclear energy that the sample at 215 k. c) the helium at 15 degrees celsius has slower- moving atoms that the sample at 215 k. d) the helium at 15 degrees celsius has smaller atoms than the sample at 215 k.