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How long would it take to produce enough aluminum to make a24 cans of Al each can 5g Al, a current 50000A was employed andcurrent efficiency was 91.1%
If the initial concentration of chlorine is 0.030M and of bromine monochloride is0.020M, what is the equilibrium concentration of bromine?
A 1.00-L vessel initially contains 0.010 mol BrCl, 0.080 molBr2, and 0.060 mol Cl2 at 500 K. Which direction will the reaction proceed in order to reach equilibrium? Support your answer with a
This is a section that is going to be part of an upcoming labquiz. The section involves an experiment we have covered this semester. In the experiment we reacted trans-cinnamaldehyde with benzyltri
Calculate the percentages of Na2CO3 and NaHCO3 in the sample.Hint: Phenolphthalein will indicate when only the first equivalence point happens, Bromocresol green will indicate when the second equiva
A 0.45 M solution of pentanoic acid (CH3CH2CH2CH2COOH) is found tohave a pH of 3.73 at 298K. What is the value of the acid dissociation constant Ka for this monoprotic acid?
Liquid A has vapor pressure x and liquid B has vapor pressure y. What is the mole fraction of the liquid mixture if the vapor pressure above the solution is 30% A by moles?Calculate i
0.10 moles of a diprotic acid, H2A, is dissolved in 250 mL ofwater. The Ka1 of this acid is 1.0 x 10E-5 and Ka2 is 1.0 x 10E-10. What is the concentration of the di-anion, [A^2-], in this solution(i
If the daily recommended quantity of Ca2+ to maintain bone strength in older women is 1500 mg, how many Tums tablets are needed each day?
Enzymes in the human liver catalyze a large number of reactionsthat degrade ingested toxic chemicals. by what factor is the rateof a detoxification reaction changed if a liver enzyme lowers the acti
A ground state H-atom absorbs a photon of wavelength 60.69 nm, and its electron attains a higher energylevel. The atom then emits two photons:
A student used a cation exchange resin to determine themolarity of sodium ion in an unknown sodium chloride solution. The student diluted the 25.00mL aliquot of the original unknownsolution to 250.0
If .934 grams of AgNO3 (formula weight 169.91 g/mol)were reacted with 100mL of 0.100 M HCL to make AgCl(formula weight 143.35 g/mol) which reactant would be the limiting reagent and t
Determine the enthalpy change, for dissolving thesalt. Report the value as the total energy absorbed orreleased when the entire sample of salt dissolves and then on apergram basis. What additional i
A tablet of a dietary supplement containing calcium carbonate is tonuetralize 38.3 mL of 0.251 M of HCL, forming calcium chloride,water and CO2. Calculate the number of milligrams of CaCO3 in t
A precipitate of FeS (Ksp = 6.3 x 10^-18) is formed by mixing 125.00 mL of a 0.32 M solution of Fe(NO3)2 with 100.00 mL of a 0.40M solution of Na2S.
An amount of 1.250g of an alloy (90% Ag, 10% Cu) was treated withHNO3 and H2SO4 to form Ag2SO4 and CuSO4. The solution was then treated with Cu wire to precipitate silver.
Write molecular and net ionic equations for the successive neutralizations of each acidic hydrogen of phosphoric acid by calcium hydroxide solution. Ca3(PO4)2 is insoluble; assume that the acid salt
You react 100.0 ml of a 1.01 M HBr(aq) solution with 99.1 mlof a 1.05 M KOH(aq) solution. The density of each solution is 1.04g/ml. The heat capacity of the calorimeter is 7.0 J/C.
If you react 100 ml of a 0.115 M Solution of HBr (aq) with98.0 ml of a 0.120 M solution of KOH(aq), how many moles are actually neutralized? After mixing, will the resulting solution have excess aci
Enormous numbers of microwave photons areneeded to warm macroscopic samples of matter. A portion of soup containing 235 g water is heated in a microwave oven from 21°Cto 90.°C, with radiatio
Use notation showing the symbol, the mass number as asuperscript and the atomic number asa subscript. Write the mass of the isotopes and their abundance.
Calculate the wavelength of radiation transmitted f from a FM radio station which operates at a frequency of 91.3MHz(Megahertz).(c=2.9979 x 10^8 m/s)
What is the purpose of applying the three amino acid sequence RGD to the surface of biomaterials? Through what cell surface receptor does the RGD interact with?
Why does H3O+ concentration have more influence on the precipitation of the salt of a weak acid, such as CaC2O4, than on the precipitation of the salt of a strong acid, such as AgCl or CaSO4?