[coffee_kafka]

Hi everybody,
I think this problem is really easy, but I'm an idiot at chemistry so I'm having issues with it:
a) The absorbance of a 1.0 x 10^-5 Fe(1,10-phen)₃²⁺ solution is measured at a wavelength of 510 nm and found to be 1.00.  What is the transmittance of this solution?

b) Suppose the solution in part (a) is diluted with DI water by a factor of 10.  What are the absorbance and transmittance of the diluted solution?

For part (a) I just did the old 10^-1 to get the transmission, which I think is correct because absorbance = -logT.  It's part (b) that I'm stuck on; I don't really have a clue how to deal with dilutions. 

Thanks.

[cpncoop]

For part b, refer to Beer's Law , A=eCl (absorbance = extinction coefficient X concentration X path length). If you dilute by a factor of 10, and everything else is constant, the absorbance is 1/10, which would be 0.1.  You can then calculate the transmittance as before.

[coffee_kafka]

*slaps forehead* duh!
I knew it was something pretty simple, and thought it might have something to do w/ beer's law, but couldn't put two & two together. 
Thanks so much for your *delete me*!