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A particular substance absorbs very strongly at 620 nm. At a concentration of 0.100 M, this substance has an absorbance of 0.835 at 620 nm.
a. Assuming that the path length is 1.00cm, calculate the value of the molar absorbitivity coefficient, E.
Vanadium(III) can reduce nitrate ion (NO3-) to nitrite ion (NO2-), producing VOCl3 also Write the BALANCED chemical equation for this reaction.
What ions and/or molecules are present in relatively large proportions in a solution of a strong acid HI (aq)?
The pK value of the system is 6.1. If the [CO2] is expressed in terms of partial pressure and equals 1.3kPa and the bicarbonate concentration is 2.2 x 10^-3 M, what is the pH of the solution.
Choose the solvent below that would show the greatest boiling point elevation when used to make a .10 m nonelectrolyte solutiona)CCl4, Kb=29.9 degree C/m
Which one of these equations describes a redox reaction. 2Al+3H2SO4(aq)-->Al2(SO4)3(aq)+3H2(g), 2KBr(aq)+Pb(NO3)2(aq)-->2KNO3(aq)+PbBr2(s), CaBr2(aq)+H2SO4(aq)-->CaSO4(s)+2HBr(g), H+(aq)+OH-(aq)-->H2O(1), CO.-(aq)+HSO4-(aq)-->HCO3-(aq)+SO42-(aq)
The density of a piece of ebony wood is 1.174 g/ml. What is the volume in quarts of a 2.1549lb piece of this ebony wood
Describe the use of light absorbing reagents in amino acid chromatography. What are these reagents used for? Name two reagents that are commonly used and describe how they react with amino acids.
100 mL of 0.150 M acid H2A are mixed with 100 mL of 0.340 M NaOH. Calculate the [H+] of the resulting solution at equilibrium. Ka1 = 1.0 x 10^-5 Ka2 = 1.0 x 10^-7
Identify the steric number, shape, hybridization about the central atom and molecular polarity of sulphuryl chloride, SO2Cl2.
If 50.0 ml of the solution prepared in 6 is reacted with an excess of sodium chloride, how many grams of silver chloride should be produced.
a solution of na2co3 of 50ml was titrated with 65.8ml of 3.00m hydrochloric acid. determine what by weight of sodium
The thought process was for the synthesis given for m nitro toluene in the solutions for 24 D, where they add the och3 group to the nh2, why did they do this? doesnt nh2 do ortho addition without the och3 group here
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