If I have a solution of multiple components (CsCl, MgCl2, CaCl2, Hepes-Tris, EGTA and sorbitol) and I know their concentrations (mmol/L), how to calculate its somolality (mmol/kg)? Thank you so much.
I am also very interested in WD 500 GB external HD. Would you please tell me whether this deal is still available (500GB deal 46刀)? Where is the link? Is the following External Enclosure suitable for it? http://www.newegg.com/Product/Product.aspx?Item=N82E16817816002 This is my first time to buy one. Many thanks!