21. A helium balloon at 35.0°C and a volume of 400.0 mL with a pressure of.900 atm is taken outside on a cold day. What would be its new volume in mL if the
temperature outside were 0.00°C, and had a pressure of 0.97 atm?

Sun is explosive itself spread 9 planets.earth is 3rd explosive in the solar system about 500 hundred million years ago . first earth became ice age and freezing climate.centre of earth magma. north zone is artic . south is anatric

Vander waals forces are inter molecular bonds that exist within molecules of the same substance. a water molecule is made up of oxygen and hydrogen atoms which share electrons between each other. the vander waals forces are forces that exist between multitude of different  molecules of water. dipole dipole forces is the type of vander waals force that exist in water. the oxygen atom which is more electronegative pulls the shared electron closer to itself thus generating a partial negative charge while the hydrogen acquire a partial positive charge. these two different charges causes attraction to occur in water molecules.

Ithink a i think i tried i hope that : )

The answer is b. because when it leaves the bat, its bringing motion on where its going.