can anyone help me in this question?

[yousuf89]

Given the specific rotation of L- Alanine = + 1.8° ( 25° C), calculate the optical rotation (observed) of a 1.10 M solution of Alanine in water at 25° C in a 25cm polarimeter tube. Show all calculations

 

I know the formula is

Specific Rotation = observed rotation (deg) × 100 / Optical path length (dm) × concentration (g/100ml)

 

I think I found that the concentration is 0.097999 g/mL and the optical path length is 2.5 dm

 

but I'm little bit confused and I was absent on the class that was talking about this because I had a fever.

 

can anyone help me?

Edited March 31, 2010 by yousuf89