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Write the electron configuration for zirconium. How many electrons are in each energy level?
What proportions of hexane and heptane should be mixed (a) by mole fraction and (b) by mass in order to achieve the greatest entropy of mixing
pcl5g reverse reaction arrow pcl3g cl2gsuppose that 3.314 g of pcl5 is placed in an evacuated 460. ml bulb which is
Consider ethanal (acetylaldehyde) which can exist as a pair of tautomers in equilibrium. Calculate the SCF energies of keto and enol forms, convert to Kcal/mole and calculate their relative energy values.
A particular reaction has a ?Ho value of -180 kJ and ?So of -254 J/mol K at 298 K. Assuming that ?Ho and ?So hardly change with temperature, determine the temperature in K at which the spontaneity of this reaction changes.
What is the pH of 100. mL of a buffer solution where the concentration of acetic acid is 0.50 M and the concentration of sodium acetate is 1.0 M? Ka = 1.8 x 10-5 for acetic acid.
What are the purpose/s of determine the melting point range for your product of acetaminophen? Note that there may be more than one correct answer.
Scandium is element No. 21 with an electron configuration of [Ar]3d14s2. Write the atomic term symbol for the ground state of Sc.
A buffer is made by mixing HCN and KCN to give a solution whose pH is 9.49. If the KCN molarity is 0.20 M, what is the molarity of the HCN?
Phosgene decomposes by the reaction COCL(g) CO(g) + Cl2 K2=8.3x10^-4 (at 360C) When 5.00 mol of COCL2(g) are placed in a 10.0 L flask, find the quilibrium concentration of COCL2, CO and CL2 using the follow steps
A fluoridated water supply contains F- at a concentration of 8.9 ppm. What is the maximum concentration of Mg2+ that can exist in this water supply without causing precipitation? The Ksp for MgF2 is 6.4×10-9. Answer in units of grams/L.
What are the H3 O^+ and OH^- concentrations of solutions that have the following pH values? A. pH1 B. pH 13 C. pH 0 D. pH 1.24 E. pH 7.96
Iron (III) oxide reacts with carbon monoxide to form elemental iron and carbon dioxide. How many grams of CO are required to react with 2.78 grams of Fe2O3?
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