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If a student received an unknown sample from the instructor and prepared a diluted solution by pipeting 15.00 ml of the sample into a volumetric flask. Subsequent to adding 2 ml of NH3 and diluting to 50.00 ml with deionizer water he read the absorbance for his diluted sample. Utilizing a previously prepared beer's curve he determined the connection of his dilution to be .00256 M. Find out the concentration of the original unknown sample?
Give the term symbol for the term occurs from each of the subsequent H-atom electron configurations, 1s, 2p, 3d. Give the values for L and S for a 4F term
Five constituionally isomeric monochlorides of molecular formula c6h13cl are formed (along with a mixture of dichlorides, trichlorides, etc.) What is the most reasonable structure for the starting alkane? why?
A 1.35 m aqueous solution of compound X had a boiling point of 101.4°C. Which one of the following could becompound X. The boiling point elevation constant for water is 0.52°C/m. A) C6H12O6 B) CaCl2 C) KCl D) CH3CH2OH E) Na3PO4
how much energy would be required to ionize 5.18 mg of nag atoms to nag ions? the first ionization energy of na atoms
A 100.0 mL aliquot of a dibasic compound with Kb1= 1*10^-4 and Kb2 = 1*10^-8 was titrated with 1.00 M HCl and a base concentration of .100 M. Calculate what the pH of the solution would be after 15.0 mL of the acid was added to the 100 mL aliquot ..
Arrange the following substances in order of increasing strength of intermolecular forces: H2O, He, I2, and N2.
filtrate be used to transfer the residue when the desired product is solid
An Arrhenius plot (ln k vs. 1/T) for a second order reaction produced a straight line with a slope of -6.81e+03 K. What is the value of the Arrhenius pre-exponential if k = 3310 M-1 s-1 at 640 K
What is the pH of a solution prepared by adding 66.0 ml of 0.100 M HCl to 43.0 ml of 0.200 M NaOH
Octane (C8H18) undergoes combustion according to the following thermochemical equation: 2C8H18(l) + 25O2(g) ? 16CO2(g) + 18H2O(l) ?H°rxn = -11,020 kJ/mol. Given that ?H°f[CO2(g)] = -393.5 kJ/mol
Carbon sequestration technologies are being actively explored by researchers as methods to remove CO2 from the atmosphere, thereby diminishing the greenhouse effect.
Calculate the bubble point pressure at 30 degree celcius for a mixture that is 50/50 mole% ethanol and water given that P1(sat)=10.46 kPa and P2(sat)= 4.24kPa assuming that the margules equation
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