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Stock Solution: 0.2 M NaH2PO4, 0.2 M Na2HPO4. Both of them are mixed to get a buffer. The pKa is 6.8. Calculate volumes of both solutions required to prepare 150mL 0.1M phosphate buffer at pH 7.4
Draw the structure of the alkoxide and the alkyl bromide needed to produce 2-ethoxy-2-methylpropane
How many hours will it take to produce 47.0 kg of Al metal by the reduction of Al3+ in an electrolytic cell using a current of 487 amps
Consider a particle in a one-dimensional box, the longest transition wavelength for the particle is 200 nm. What is the transition wavelength if the mass of the particle is doubled
a plant manufacturing nails and screws uses a large pool volume 10000 l to collect and treat its residual waste water
The following question refers to a solution that contains 1.48M hydrofluoric acid, HF (Ka = 7.2 x 10^-4) and 3.00M hydrocyanic acid, HCN (Ka= 6.2x 10^-10). What is the pH of this mixture of weak acids.
calculate the mass of magnesium needed to generate 80.0 ml of h2gas. assume a temperature of 22.0 degc and a pressure
What are the molecular weights of ether and dimethylether? Are they isomers of each other or is each an isomer of something else? Why are there significant differences in their chemical and physical properties?
a natural hormone of moths has a molecular formula of C21H40(its a zero not an o) and yields the following three compounds on ozonolysis; (1) dodecanol
The U.S Food and Drug Administration (FDA) recommends the you consume less than 2.4 g of sodium per day. What mass of sodium chloride (in grams) can you consume and still be within the FDA guidelines
The weight of an object is the product of its mass,m , and the acceleration of gravity,g (where g= 9.8m/s^2 ). If an object's mass is 10kg, what is its weight
A 25.0-mL sample of 1.00 M NH3 is titrated with 0.10 M HCl. What is the pH of the NH3 before the titration begins? Kb = 1.8 × 10-5
Explain, in detail, how concentrated sulfuric acid catalyzes the Fischer esterification reaction? Use structures to illustrate your point
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