What is the frequency of light produced by the electronic transition between levels 4 and 2 of a hydrogen atom

Ihat will happen if i added baking soda to vinegar

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

If we compare and contrast electromagnetic waves with sound waves, all but one statement is true. that is a) sound waves require a medium to travel while electromagnetic waves do not. b) electromagnetic waves can travel through the vacuum of space while sound waves cannot. c) electromagnetic waves must have a medium in which to travel, but sound waves can travel anywhere. eliminate d) sound waves must bounce off of matter in order to travel while electromagnetic waves do not require matter to be present.