NEED THIS NOW!! ON THE QUIZ Which type of energy refers to the sum of potential and kinetic energies in the particles of a substance? motion
stored
internal
heat

How many moles are in 7.2 x 10^23 carbon molecules? (*round to the nearest hundredth and include the unit "mol c" after your number) question 6 options:

8) a mixture of he, ne and ar has a pressure of 7.85 atm. if the ne has a mole fraction of 0.47 and 8) ar has a mole fraction of 0.23, what is the pressure of he? a) 4.2 atm b) 3.7 atm c) 5.5 atm d) 2.4 atm e) 1.8 atm

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.