## Problem 1.25 (c) 6th edition

$c=\lambda v$

skyeblee2F
Posts: 62
Joined: Fri Sep 28, 2018 12:23 am

### Problem 1.25 (c) 6th edition

It asks to find how much energy is emitted by 1.00 mol of sodium atoms with a wavelength of 589 nm. The solutions manual says to simply multiply Avogadro's number by the energy it takes to emit a single photon of that wavelength. The units do not seem to add up, though. We just want an answer in joules but there is also the mol^-1 from Avogadro's number?

skyeblee2F
Posts: 62
Joined: Fri Sep 28, 2018 12:23 am

### Re: Problem 1.25 (c) 6th edition

I'm replying to my own question because I just noticed what the issue was. Though it is not said in the manual, Avogadro's number and the photon energy are also being multiplied by 1.00 mol. This cancels out with the mol^-1.