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You plan to marinate a piece of beef for your dinner. The beef is 5 by 6 inches with the thickness of 1 inch. You rub salt and pepper all around it, and set it aside for 30 minutes. Then you checked it after 30 minutes and found that the beef tastes salty at about 1/5 inch from the surface (Sorry, you still have not cooked it yet.Hope that you enjoy your raw beef).(a). What is approximately the diffusion constant of salt in beef (in terms of cm2/s).(b). But when you put the beef in a frying pan (about 370C) right after you put salt on and sear it for 30 minutes, you find the beef tastes salty at the middle already. What is the diffusion constant at this temperature?(c) Can you figure out the activation energy for salt diffusion in beef?(d) Explain why corned beef makers put beef into vacuumed chambers to marinate the beef?
estimate the ratio of their conductivities at room temperature
Explain the effect of pH on the aqueous solubility of dissolved organic matter (use the 13C NMR spectra on the International Humic Substances Society as your primary reference). Speculate on how DOM fractionation would change crossing a riverine (..
(R)-(3-Chloro-2-methylpropyl) methyl ether (A) on reaction with azide ion (N3-) in aqueous ethanol gives (S)-(3-azido-2-methylpropyl) methyl ether (B). Compound A has the structure ClCH2CH(CH3)CH2OCH3. Draw the wedge-dash, wedge-line formula for A..
A solution of a weak acid, HA, is prepared by dissolving 4.8 mmol of HA in 10.0 liters of a solution.The following values of absorbances were measured in a 1.0 cm cell in various buffers.
Determine the boiling point of a 1.5m aqueous solution of fructose.
Zinc is extracted from its ore by heating with carbon in the blast furnace. How much zinc oxide do you need to make 130 g of zinc?
If you remove a piece of paper with a secret message written with lemon juice from a tincture iodine bath and let it dry, what will happen over a long period of time? Explain why?
would be decomposed by a complete reaction with one drop of water? Assume that 1 drop ~ 0.05 mL. If you started with 0.4 g of trityl fluoborate, how much of it would have been left?
What is the empirical formula for an prganic compound whose percentage composition is 40.0% carbon
Draw the LUMO Huckel MO for the cation 1, 3, 5-heptatriene (carbocation is carbon 7). Also, please state the number of pi electrons in this conjugate system
A titration required 16.86 mL of 0.1672 M of NaOH - how many moles are in the volume
Phosphorus-32 has a half-life of 14.0days . Starting with 6.00g of 32p , how many grams of phosphorous will remain after 42.0days.
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