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At what angle will X rays of wavelength 0.166 nm be diffracted from a crystal if the distance (in pm) between layers in the crystal is 183 pm? (Assume n = 1.)
An enzyme-catalyzed reaction produces a product that has a maximum absorbance at 412 nm. The extinction coefficient is 4000 M^-1 cm^-1. A 10-to-1 dilution of the enzyme is made and 20 microliter of the dilution are put into a cuvette with 80 micro..
Parameters in a model can interact with each other, so that the sensitivity of the model to one parameter depends on the value of a second parameter. The same is true of species' behavioral characteristics, in terms of how they can affect populati..
what is the ph of a buffer prepared by adding 180 ml of 0.100 m naoh to 200 ml of 0.100 m acetic acid? ka for ch3cooh
a teacher has a stock solution of 12m hcl. they need to make 500 ml of a 2.5 m solution of hcl. calculate and
to recrystallize a solid the solvent used must dissolve very little solid when cold and a lot of solid when hot.
Problem- Calculate the molarity of a sodium hydroxide solution if a .5356g sample of KHP was dissolved in 50 ml of water and titrated with 20.78 ml sodium hydroxide to a phenolphthalein endpoint.
Determine the pH of a solution that is 1.80% NaOH by mass. Assume that the solution has density of 1.01 g/ml.
Then use the estimate to calculate the heat of formation of ethanol from the heats of formation (in KJ/mol) of CO2: -?394, and H2O: -?242.
Give the structural formulas for all of the different alkenes that can be hydrogenated with h2/pt to produce n propyl cyclohexane
When iron rusts, solid iron reacts with gaseous oxygen to form solid iron(III) oxide. Write a balanced chemical equation with all phases identified
Calculate the E0 for the following reaction by using the standard reduction potentials data in your lab manual. Write net ionic equation and half reactions of Cr2O72- oxidizing Sn2+ in acidic aqueous solution. Find an calculate their E0
Blood has a density of 1060 kg / m3. Circulating all of the blood in the body through the heart takes about one min for a person at rest. (a) Explain how much blood is in the body
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