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You used Job's method to analyze several samples of [Fe(SCN)n]^+3-n and plot their absorbances on a graph of Absorbance vs. Mole Fraction of SCN-. The resulting equations are y=1.2550x + 0.0707 and y=-1.2550x + 1.3377. Determine the overall mol fraction of each ion, the n value, and the empirical formula of the iron complex
A 25ml solution of quinine was titrated with 1.00 M hydrochloric acid, HCl. It was found that the soluiton contained 0.125 moles of quinine. What was the pH of the solution after 50 ml of the HCl solution were added? Quinine is monobasic with pKb=..
assume that you have two unlabled bottles, one with cyclohexane and one with cyclohexene. How could you tell them apart by carrying out chemical reactions
When Lewis and Clark came through this area in the early 1800s they were forced to portage around the "Great Falls of the Missouri".
How many moles of oxygen are combined with 4.20 moles of chlorine atoms in C2O7?
By what factor (how many times) will the rate constant increase when the temperature is raised from 10°C to 28°C?
The water level in a graduated cylinder initially at 211 rises to 282 after a piece of lead is submerged. What is the mass in grams of the lead.
A solution contains 4.64g KCl in 178 mL of solution. The density of the KCl solution is 1.14 g/mL. What is the molarity,M, for the potassium chloride solution?
Protein Quantification :why did you choose one standard curve over the other for analysis of your unknown?
light of wavelength 221nm striking a sample of tungsten causes electrons to be ejected with a speed of 6.04x10^5 m/s. calculate the work function of tungsten
How many kilojoules of heat are required to melt a 10.0-g popsicle at 0 C? Assume the popsicle has the same molar mass and heat of fusion as water.
A gas occupies a volume of 2.45 L at a pressure of 1.03 atm and a temperature of 293K. What volume will the gas occupy if the pressure changes to 0,980 atm and the temperature remains unchanged?
Chlorine gas can be produced commercially by passing an electric current through a concentrated solution of sodium chloride (brine).
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