11 When an object is dropped into a graduated cylinder, the water in the
cylinder rises from 50.OmL to 56.3 mL. The mass of the object is 15.9 g.
What is the density of the object? *

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.

Which other elements contain the same number of outer electrons as sodium

What was bohr’s contribution to the planetary model