The question goes like this. Boron often forms compounds that do not comply with the octet rule that are termed electron deficient. BF3, whose structure is shown below on the left, is an example of an electron deficient compound. Note that the central boron atom is only surrounded by 6 valence electrons. The resonance struct ...continues
10.0g of Fe(s) at 98.0 degrees Celsius is placed in 50.0mL of H2O(l) at 20 degrees Celsius. Assuming no energy is lost to the surroundings what is the final temperature of Fe(s) and H2O(l) at thermal equilibrium?
The H (height equivalent of a theoretical plate) value for an HPLC column at mobile phase flow rates of 1ml/min, 3ml/min and 4ml/min are 4.1mm, 4.7mm and 5.675mm. Calculate: 1. The van Deemter parameters A,B, and C 2.the flow rate at which H is a minimum and the value of H at this flow rate 3. the efficiency N if the length ...continues
The enantiomers (R and S forms) of the following chiral alcohols need to be separated by a suitable CHIRAL SEPARATION method. What is a reasonable approach that will yield the separations of the two isomeric alcohols and their enantiomers. Rationalizing the approach used on the basis of chiral recognition mechanism. What will ...continues
Given: 1. cloumn length: 1.1m ID = 2mm 2. wt of stationary phase = 1.4g /density = 1.02g/ml 3. avg volumetric flow in column = 30.2ml/min 4. inlet pressure = 26.1psi above ambient press 5. room temp = 21.2C column temp = 102C RETENTION TIMES: air = 0.3 min propanol = 2 min butanol = 4.2 min hexanol = 8 min PEAK WIDTH ...continues
Define Supercritical fliud. Give an example and it's properties. Which fundemental thermodynamic property is important to the solubility of an analyte in supercritical fluid?
Define capillary isoelctrofocusing and how is it used? What is the difference between capillary electrophoresis and gel electrophoresis?
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 particles are tightly packed and that the void volume is essentially due to the pore volumes of the particles, calculate: 1. the #o ...continues
Capillary Electrophoresis experiment
Capillary Electrophoresis experiment: Given: 1.aqueous buffer at 15kV 2.capillary ID of 75micrometers 3.total lentgh of capillary is 57cm 4.length of capillary to detectoris 50cam 5.migration time for acetone= 5min 6.migration time for unipositive analyte = 3min 7.migration time for a uninegative analyte = 8min 8. diele ...continues
conversion of grams to milliliters
An aspirin weighs .37 grams and its Molar concentration is 2.0x10-4. I need to convert the weight of aspirin in grams to milliliters in order to solve for the amount of moles. How do you convert?
