00:02
Okay, so for this transition, we're going from n equals 1 to n equals 3.
00:13
So the change in energy is equal to minus 2 .18 times 10 to minus 18 joules times 1 over an initial squared minus 1 over in final squared.
00:38
So if we go back to the secretion, you know what our initial and our final ends are.
00:51
So our initial is 1, so 1 over 1 squared, minus our final is 3.
01:02
So 1 over 3 squared.
01:06
So then when you multiply that out, you get 1 .938 times 10 to the minus 18, jude.
01:20
And this is per atom.
01:28
So if we want to find how many or what the change of energy is per mole, then we need to multiply by avogadro's number, which is 6 .022 times 10 to the 23 atoms per mole...