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Iron (II) ions catalyze the oxidation of luminal. The intensity of the resulting chemiluminescence has been shown to increase linearly with iron(II) concentration from 10-10 to 10-8 M. Exactly 1.00 ml of water was added to a 2.00 ml aliquot of an unknown Fe(II) solution, followed by 2.00 ml of a dilute H2O2 solution and 1.00 ml of an alkaline solution of luminol. The chemiluminescent signal from the mixture was integrated over a 10.0 s period and found to be 16.1. To a second 2.00 ml aliquot of the sample was added 1.00 ml of a 5.15 x 10-5 M Fe(II) solution followed by the same volume of H2O2 and luminol. The integrated intensity was 29.6. Calculate the Fe(II) molarity of the sample.
How many grams of dry NH4Cl need to be added to 2.10L of a 0.500 M solution of ammonia, , to prepare a buffer solution that has a of 8.84? Kb for ammonia is 1.8*10^-5.
An aqueous antifreeze solution is 40.0% ethylene glycole (C2H6O2) by mass. The density of the solution is 1.05 g/cm3. Compute the molarity, molarity, as well as mole fraction of the ethylene glycol.
If your electricity comes from a 33% efficient nuclear power plant, how many Pu-239 nuclei are produced as a result of your leaving the light on?
Problem- If a buffer solution is .140 M in a weak base (k_b=7.0*10^-5) and .530 M in its conjugate acid, what is the pH. Please illustrate work if possible thanks
During this process, 346 J of work was done by the system and its internal energy 9185 J. What is the specific heat of the gas?
According to the subsequent reaction, explain how many grams of tetraphosphorus decaoxide are necessary for the complete reaction of 32.9 grams of perchloric acid (HClO4)
A 100.0mL flask contains sulfur dioxide at 0.77atm and 30 degrees C. Explain what mass of gas is present
A sample of rock is found to have a 235U/207Pb ratio of 1 to 15. From its minerology, we know that it contained no lead at the time when it first crystallized. How old is the rock
how much energy in kilojoules is required to convert 195ml of diethyle ether at its boiling point from liquid to vapor
a strip of magnesium of mass 15g is dropped into a beaker of dilutenbsp hydrochloric acid. calculate the work done in j
Draw a phase Diagram (label axes), showing normal boiling boint, critical temperature (b) define critical temperature
Need help figuring out the proper steps on how to solve -What volume of 1.25M HCl in liters is needed to react completely
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