You need 70.2J to raise the temperature of an unknown mass of ammonia, NH3(g) from 23.0 C to 24.0 C. If the specific heat of ammonia is 2.09J/(g×K), calculate the unknown mass of ammonia.

Harvey kept a balloon with a volume of 348 milliliters at 25.0˚c inside a freezer for a night.  when he took it out, its new volume was 322 milliliters, but its pressure was the same.  if the final temperature of the balloon is the same as the freezer’s, what is the temperature of the freezer? the temperature of the freezer is  kelvins.

The grooves or folds of the brain are called

In the cathode ray tube experiment, j. j. thomson passed an electric current through different gases inside a cathode ray tube in the presence of an electric field. in which two ways did this experiment change scientists’ understanding of the atom?