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Draw the reaction scheme (with arrows) of the Diels Alder rxn between maleic anhydride and furan. draw both the endo and exo adducts
Two students measure the density of gold. One works with a 100-g bar of pure gold. The other works with a 200-g bar of pure gold. Which student measures the larger density.
What is the molarity of an aqueous solution containing 75.3 g of glucose (C6H12O6, mol wt = 180 g/mole) in 35.5 mL of solution
The heat of vaporization of CCl2F2 is 289 J/g. What mass of this substance must evaporate to freeze 165 g of water initially at 15°C? (The heat of fusion of water is 334 J/g; the specific heat of water is 4.18 J/g-K.)
A sample of neon is collected at 2.7atm and 12.0C.It has a volume of 2.25L. what would be the volume of this gas at STP.
Calculate the hydrogen Ion concentration, in moles per liter, for solutions with each of the following pH values.
Find the mass of urea (CH4N2O) needed to prepare a 50.2g of a solution in water in which the mole fraction is 7.51*10^-2.
When heated to 350 at 0.950 , ammonium nitrate decomposes to produce nitrogen, water, and oxygen gases.
Calculate pCd2 at each of the following points in the titration of 50.00 mL of 0.0060 M Cd2 with 0.0060 M EDTA in the presence of the auxiliary complexing agent NH3
determine the mass of each of the following salts required to form a saturated solution
To characterize the elution properties of the solute in a way independent of the geometry of the chromatographic column, the retention constant R = Vo / Ve is used. R is equal to the fraction of solute in the void volume Vo and
How many grams of Na3PO4 is needed to produce 575mL of a solution that has a concentration of Na+ ions of 1.50M?
Given the values of Ka and Kb below, which of the systems given would be most suitable to use to construct a buffer of pH 9
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