7. Calculate the energy of transition involving ni = 3, n2 = 5 in a
hydrogen atom, given that R = 109,677 cm, h = 6.626 X 10-34
kgm’s and c = 3.0 x 108ms.​

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )

Melting and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.

Which sentence about particles in matter is true? a. atoms are present in solids and liquids but not in gases. b. the particles of matter are in constant motion. c. the same kinds of atoms are found in different elements. d. when a solid changes to a liquid, the sizes of the particles change.