Energy (in kJ/mol) needed to remove an electron from hydrogen atoms which have been excited to to n=5 shell?

Answer 1

The energy of the electron of the hydrogen atom at the ground state equals:

E1 = -2.18x10^(-18) J

The energy of the electron of the hydrogen atom at the shell with n = 5 equals:

E5 = E1/5^2 = --2.18x10^(-18)/25 J = -8.72x10^(-20) J

So, to remove this electron from 1 hydrogen atom we need:

ΔE = 0 - (-8.72x10^(-20)) = 8.72x10^(-20) J

And to remove this electron from Na = 6.023x10^23 (1 mol) of hydrogen atoms we need:

ΔE * Na = 8.72x10^(-20) x 6.023x10^23 = 52,520.56 J or

52.56 kJ/mol (approx)

Answer 2

As a self-taught drummer myself, i'm able to allow you know that there incredibly is not any 'speedy" thank you to check an device. It takes various endurance, prepare, discipline, and not common artwork. Now that being pronounced, some people do study swifter than others so it rather relies upon on the guy. I even have 2 cousins that the two play guitar and the two are self-taught. My one cousin Terry practiced virtually on a daily basis and picked it up swifter than my cousin Dave, who did no longer prepare almost as a lot. Terry grew to develop into incredibly darn sturdy in approximately 8 months. all of it boils all the way down to how desperate you're, how a lot you prepare, and how rapidly you %. issues up. My advice could be to get an academic e book or DVD and study some chords. in case you do it on your individual you will shop various funds and you are able to circulate at your individual %.. Guitar instructions are no longer much low-priced at present, till you know somebody. in basic terms supply it a shot on your individual for a month or 2 and notice the way you progression. Then in case you experience you like instructions to get extra helpful, then hit upon a sturdy instructor that should not be too high priced. however the nice and comfortable button is to coach....prepare.....prepare! sturdy good fortune!