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Problem- a) Sketch a graph of the van Deemter equation (plate height vs. linear flow rate). What would the curve look like if the mutliple path term were 0? If the longitudinal diffusion term were 0? If the finite equilibration time term were 0?
b) Explain why the van Deemter curve for 1.8?m particles is nearly flat at high flow rate.
c) Explain why the 2.7 ?m superficially porous particle enables separations similar to those achieved by 1.8 ?m totally porous particles, but the superficially porous particle requires lower pressure.
I just need a general explanation of it please- Thanks!
if the pressure of chloroform vapor in a flask is 154 mm hg at 25.0degc and the density of the vapor is 1.25 gl what is
calculate the number of moles of KOH in 5.5mL of a .36 M KOH solution. what is the pOH of the solution?
nitrogen dioxide no2 cannot be obtained in a pure form in the gas phase because it exists as a mixture of no2 and n2o4.
What happens to the temperature of a liquid as evaporation occurs. A. The temperature of the liquid increases. B. The temperature of the liquid remains the same. C. The temperature of the liquid decreases. D. Liquids cannot evaporate
Identify which sets of quantum numbers are valid for an electron. Each set is ordered (n,\ell,m_\ell,m_s).
Problem- A buffer solution contains 0.382 M ammonium bromide and 0.418 M ammonia. If 0.0268 moles of perchloric acid are added to 125 ml of this buffer, what is the pH of the resulting solution
A certain quantum mechanical system (NOT the hydrogen atom) has the energy levels shown in the diagram below. The energy levels are indexed by a single quantum number n that is an integer.
Question- given the balanced equation 4NH3(g)+5O2(g)+6 H2O(g) answer the following questions. 1) What is the theoretical yeild of NO(in grams), from a mixture of 45.0g NH3 and 58.0g oxygen gas
in what type of material is the energy gap between the valence and the conduction band the greatest? na ge or diamond.
The K a of hypochlorous acid (HClO) is 3.00 x10^-8 what is the pH at 25.0 degrees C. of an aqueous solution that is 0.0200 M in HClO
An exothermic reaction liberates 7.58 kJ of heat in a coffee cup calorimeter containing 157 grams of solution. The temperature of the solution in the calorimeter increases by 11.2°C. How much heat was absorbed by the calorimeter? Assume the specif..
What is the purpose of washing the products of a dehydration of 2-Methylcyclohexanol with saturated aqueous sodium chloride and saturated aqueous sodium bicarbonate
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