PLS HELP ITS FOR A QUIZ Use the data table below given the time (minutes) and the mass remaining (g) to determine the half life of the radioactive isotope.

What is the ph of a 0.0010 m hno3? 1.0 3.0 4.0 5.0

Which of the following are correct values for the ideal gas laws constant r

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.