A 50 ml solution suspected of containing ammonium ions was diluted to 250 mL A 50.0 mL aliquot of the diluted solution was analysed by Back-Titration. A 100 mL aliquot of a std 0.2005 M NaOH (MM = 40 g/mol) solution was added to the solution. The excess NaOH was back-titrated with 25.0 mL of a 0.1204 M std HCI (36/45 g/mol). The concentration of the ammonium ion (MM-18.04) in the initial sample solution (in g/dm) is:​

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.