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If 1.0 μg/ml of pigment X shows an absorbance of 0.059 at 370 nm, then what is the concentration of a solution of pigment X that shows an absorbance of 0.443 at 370 nm? (Assume linearity.)
The element magnesium has 3 isotopes with the masses and natural abundances shown in the table. Mass of Isotope Natural abundance 23.98504 78.99 24.98584 10.00 25.98259 11.01 What is the average atomic mass of magnesium
In preparing the sodium thiosulfate solution, the solid Na2S2O3x5H2O is not dried. Will this oversight cause the reported molar concentration of the standard Na2S2O3 solution to be too high, too low or unaffected? Explain.
You have a protein that undergoes conformational change from folded state(F) to unfolded state(U) depending on pH. For each state draw a graph for how scattering intensity might change with time.
Nitartion of ferrocene not possible why, Ferrocene cannot be nitrated using the conventional HNO3-H2SO4 mixed acid conditions, even though nitration is an electrophilic aromatic substitution reaction. Explain.
a common driving force in displacement reactions? a. precipitation b. evolution of a gas c. formation of a weak or nonelectrolyte d. the transfer of electrons
Explain why treating a mixture of vanillin and eugenol to steam distillation would result in distillation of eugenol only
What is ionization energy. Why are the second and subsequent ionization energies higher than the first ionization energy
After you filter off the component that does not dissolve in dichloromethane, you will transfer the dichloromethane to a separatory funnel and wash with aqueous 1 M sodium hydroxide. Which layer is the dichloromethane layer
A 53.5 g of an ideal gas of molecular weight = 10.5 g/mol is confined at a pressure of 50 kPa. The density of the gas is 0.164 g/L. Compute the temperature of the gas in degrees Celsius.
a gas-filled balloon having a volume of 2.50l and 1.2 atm and 25 celsius is allowed to rise to the stratosphere about
Which one of the following materials can be classified as a semiconductor. B SiO2 Ag Pb GaN
A compound is heated to produce gas whose molecular mass is to be determined. The gas is collected by displacing water in a water filled flask inverted in a trough of water
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