Explain how the total number of
atoms are
different from
the total number
of elements in a
compound

The number of moles of a given mass of a substance can be found without knowing its molecular formula or molar mass. true false

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.

Find the midpoint of a segment with endpoints of 4-3i and -2+7i