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layered 20 mL of 2% sebacoyl chloride (decanedioyl chloride)/hexane on top of the aqueous solution. And then we used forceps to draw the solid that forms at the interface A(nylon) into a thread and
A 100.0 Ml SAMPLE OF 0.100 M methylamine (CH3NH2, Kb = 3.7 x 10^-4) is titrated with 0.250 M HNO3. Calculate the pH after addition of each of the following volumes of acid
What is the theoretical slope at 30°C What is , the electromotive efficiency to three significant figures. What is the pH of an unknown that gives a reading of 46.7 mV with this electrode at 30&
Some atomic properties depend on the average value of 1/r rather than the average value of r itself. Evaluate the expectation value of 1/r for a hydrogenic helium 1s orbital.
There are two ways of utilizing hydrogen as fuel in automobiles - as the replacement of gasoline in internal combustion engine or in a fuel cell. Can you explain why a fuel cell is more efficient us
What mass of solid sodium hypochlorite (molar mass = 74.44 g/mol) should be added to 1.0 L of 0.255M hypochlorous acid to make a buffer with a pH of 7.54?
propes a mechanism that shows why P-chlorotoluene reacts with sodium amide in liquid NH3 At -33C to give a 1:1 mixture of P-toluidine and m-toluidine
A cell composed of a platinum indicator electrode and a silver-silver chloride reference electrode in a solution containing both Fe2 and Fe3 has a cell voltage of 0.718 V. If the silver-silver chlor
The student rinses the sample into a small beaker using distilled water, and then titrates the solution with a 0.500 M HCl solution. 12.00 mL of the HCl solution is needed to reach the endpoint of t
Write the electron configuration of the atom in the third row of the periodic table that has the largest difference between the third and fourth ionization energies.
0.497ml sample of HClO4 has a pH of 0.2251. If 647ml of distilled water was added to the HClO4 solution, what would be the new pH of solution be
2- hexanone and 4 - methyl-2-pentanone are isomers, thus their molecular weights are equal. What are some reasons why their boiling point and GC retention time is different
When 3 methyl 1 butane reacts with Hbr, two alkyl halides are formed: 2 bromo 3 methylbutane and 2 bromo 2 methyl butane. Propose a mechanism that explains the formation of these products.
What is the %Cu (by mass) in the metal oxide product formed when Cu2CO3(OH)2 decomposes upon heating above 200°C
The methylamine hydrochloride dissociates completely in water to form methylammonium ion (CH3NH3+) and chloride ion.
With respect to the Cooper pair model, explain why increasing temperature reduces the effectiveness of low-temperature superconductors.
Consider the decomposition of calcium carbonate. Assume that ?H° = 177.8 kJ/mol and ?S° = 160.5 J/K·mol for the temperature range. CaCO3(s) -> CaO(s) + CO2(g)
What is the molar solubility of silver bromide in a solution that also contains 0.050M Ag+ ions at 25 °C? The Ksp of AgBr is 5.4 × 10-13.
If the molecular weight of a molecule is 180, how many grams would be required to make 100 milliliters of a 2 molar solution
Calculate the pH of a solution prepared by dissolving 18.32 grams of benzoic acid and 43.23 grams of sodium benzoate in water sufficient to yield 1.00 L of solution.
What mass of solid sodium fluoride (molar mass = 41.99 g/mol) should be added to 1.0 L of 0.23M hydrofluoric acid to make a buffer with a pH of 2.94? (Ka of HF = 1.36 x 10-3)
Manganese dioxide reacts with hydrochloric acid as shown in the chemical equation MnO2(s) + 4HCl(aq)-->MnCl2O(l) + Cl2(g) What is the percent yield of the reaction if 5.75 g of H20 is obtained wh
Using the ideas regarding the effect of basic anions on salt solubility. Which order is correct for the solubility and the Ksp.
What is the %Cu (by mass) in the metal oxide product formed when Cu2CO3(OH)2 decomposes upon heating above 200°C?