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Heat of hydrogenation of 1,3,5-hexatriene is -335 kj/mol. that for 1,5- hexadiene is -252 kj/mol. Estimate the resonance energy of hexatriene.
Find the mass of 2 moles of phosphorus trichloride.
after you preform your experiment you determine that the kf value for naphthalene is 6.91 . you are using 10g of
Write the structures (or name the structures) for the major monobromination products that would be formed from each of the following substrates used. Explain your predictions.
The refractive indices at 20o C of isobutyl bromideand isobutyl choloride are 1.4368 and 1.3785 respectively.Determine the molar composition (in percent) of the mixture byassuming a linear relationship
A solution of ammonia and water contains 4.40×1025 water molecules and 8.30×1024 ammonia molecules. How many total hydrogen atoms are in this solution?
The volume of .05 M KOH solution that contains the same number of mmol as .1 mL of tert-butyl bromide? For the number of mmol of tert-butyl bromide, I got .8912 mmol.
The element is so highly unstable that no observations of its properties have been possible. Based on its position in the periodic table, propose two different reasonable valence electron configurations for this element.
Calculate the pH of a solution containing 0.085 M nitrous acid (HNO2; Ka= 4.4 × 10-4) and 0.10 M potassium nitrite (KNO2).
A 12 oz can of Coke contains 46 mg of caffeine. One fluid ounce is equivalent to 29.57 mL (1 oz = 29.57 mL). What is the concentration of caffeine in Coke, in units of mg/mL
combining 0.228 mol of FecO3 with excess carbon produced 13.2g of Fe. Fe2O3 + 3C -> 2Fe + 3CO what is the actual yield of iron inn moles? what is the theoretical yield of iron in moles? what is the percent yield
A solution containing the two compounds exhibits absorbances (using a 1.00cm cell) of 0.726 and 0.544 at 267 and 312nm, respectively. What are the concentrations of A and B in mg/mL? Note: The aborptivity values are given in units of L/g.cm.
Compare and contrast these methods of extraction- Solid phase extraction, liquid liquid extraction, Supercritical fluid extraction, Derivatization, and solid-phase microextraction
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