Molecular Exclusion

why do different columns have different void volumes?

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Molecular Formula - The composition of the acid is 49.3% C 6.9% H and 43.8 O (dry mass) and the molecular weight is 146 amu. What is the molecular formula?
Determining molar concentration of a compound when pH is known? - Dr M We start with a 1 liter solution of water and a mild acid --- the pH of this solution is 4.0; To this solution, we add 100 grams of Chemical A that has a pH of 10.89 and a molecular weight ...
A chemist isolated 6.3 mg of one of the many boron hrdrides... - A chemist isolated 6.3 mg of one of the many boron hrdrides in a glass bulb with a volume of 385 mL at 25.0 degree celcius and a bulb pressure of 11 torr. A) what is the molecular mass of this hydr ...
HPLC Prob - An HPLC column of length 15cm and ID of 4.6mm is tightly packed with monodisperse ODS paritcles of diameter 3:m surface area 300m/g^2 and density 1.2g/mL. Dead volume is 1.2mL. Assuming that the part ...
Calculate the molecular formula of this compound if the molecular weight is 416.4 g/mole - When Barium metal is heated in chlorine gas, a binary compound forms that consists of 65.95% Ba and 34.05% Cl by mass. Calulate the molecular formula of this compound if the molecular weight is 416.4 ...