A gas filled balloon having a volume of 2.50 L at 1.21 atm and 25oC is allowed to rise to the stratosphere (~30km above the surface of the Earth), where the temperature and pressure are -23oC and 3.00 x 10-3 atm, respectively. Calculate the final volume of the balloon.

When a spring is compressed, the energy changes from kinetic to potential. which best describes what is causing this change?

What is the subscript for oxygen in its molecular formula

Adeuteron, 21h, is the nucleus of a hydrogen isotope and consists of one proton and one neutron. the plasma of deuterons in a nuclear fusion reactor must be heated to about 3.02×108 k . what is the rms speed of the deuterons? express your answer using two significant figures.