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A TLC chromatographic system is prepared using a silica coated plate and the non-polar solvent hexane. Two samples are spotted onto the plate and developed as in the laboratory experiment. THe Rf of the two samples are: 1.)=0.02 and 2.)=1.0 respectively. What is the elution order if these same compounds are separated on a silica column using a polar solvent such as water?
Calculate the amount of vitamin C in mg that are titrated by one milliliter of the 0.05N iodine solution.
A mixture of CO, CO2 and O2 is contained within a 275 mL ?ask at 0 ? C. If the total pressure is 780 torr, the CO has a partial pressure of 330 torr and the CO2 has a partial pressure of 330 torr, what is the partial pressure of O2
If an air bubble was initially in the buret tip but was dispensed during the back titration of the unreacted HCl. As a result of this technique error
If several large air bubbles entered the graduated cylinder filled with water when it was inverted into the water trough, what would the effect be on a plot of volume H2(g) vs. mass Mg?
The hydrogen carbonate ion can act as both an acid and a base. Write out two equations which demonstrate this and calculate (or look up) the equilibrium constants for both expressions
how many liters of 13.5 molar HCl stock solution are needed to make 10.5 liters of a 1.8 molar HCl solution?
Ammonia (NH3) is widely used as a fertilizer and in many household cleaners. How much ammonia is produced when 6.32 mol of hydrogen gas react with an excess of nitrogen gas?Answer in units of mol
when 0.273-gm of Mg is reacted at high temperatures with N2 to produce 0.378-gm of a solid, MgxNy. Calculate the empirical formula of the product.
If iron(III) acetate is added to be 1 x 10^-10 M in a solution that is 0.10 M NH3, what is Qsp and will Fe(OH)3 precitate? the Ksp of Fe(OH)3 is 4x10^-38 and Kb for NH3 is 1.8x10^-5
Using the van der Waals equation, calculate the pressure exerted by 15.0 mol of carbon dioxide confined to a 3.00-L vessel at 56.0 oC. Note: Values for a and b in the van der Waals equation: a = 3.59 L2.atm/mol2, and b = 0.0427 L/mol.
Calculate the dilution factor for all 7 test test tubes. Show all work/calculations. 0.1 ml of the solution from the serial dilution 10^-4, 10^-5 and 10^-6 was pipetted onto three separate agar plates.
What is the value of Ksp for Ag2SO4 if 5.40 g is soluble in 1.00 L of water?
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