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Erioglucine is a blue-colored dye that absorbs its complementary color, red, in aqueous solution around 645 nm. Unfortunately, the local distilled water supply used to make solutions is consistently contaminated with a trace amount of a metal cation that also absorbs 645 nm light. Suppose then, a control sample of 0.0552 M erioglucine (aq) has an absorbance of 0.331 and that a distilled water sample in a similar cuvette has an absorbance of 0.019. Determine the concentration of an erioglucine (aq) sample that has an absorbance of 0.217.
boron-fluorine single bonds are approximately 1.52A(152pm) in length. in BF3, the bond lengths are 1.30A. propose an explanation for this discrepancy, making use of resonance structures to illustrate your answer.
450 mL of oxygen is bubbled through water at 10 degrees celsius and exerts 720.0 torr. What volume will the dry gas occupy at 730.0 torr and 10 degrees celcius?
Determine the vapor pressure lowering at 27C of a solution of 75g of sucrose dissolved in 180 g of water. Vapor pressure of pure water at 27C is 26.7 torr
A certain reaction has activation energy of 44.54 kJ/mol. explain at what Kelvin temperature will the reaction proceed 5.00 times faster than it did at 299 K
An unknown amount of magnesium metal reacts with 100.0 mL 0f 0.100M aqueous hydrochloric acid. The final solution is acidic, and titrated to an endpoint using 0.150 M aqueous sodium hydroxide. The endpoint was neutralized after the addition of 16...
If one starts with five grams of acryl amide and forms a gel, explain what would be the molecular weight of the polymer if 60% of the acryl amide reacts assuming that you form a single polymer molecule. Acryl amide: CH2=CH-CO-NH2
Find the pH of the equivalence points and the volume of 0.0372 M NaOH needed to reach it in titrations of 28.9 mL of 0.0850 M H2SO3
A radiation source has an intensity of 650 rem at 1.0 m, what distance is needed to decrease the intensity of expo- sure to below 25 rem, the level at which no effects are detectable
The reaction 2NO ? N2 + O2, has a rate constant of 3.6 x 10^-2 M^-1 s^-1. When [NO]= 2.8 x 10^-3 M, what is the rate of change in M.s^-1 for N2
a scientist conducts an experiment to determine the rate of no in formation in the reactionn2go2g--gt2 nogif the
similarly, what happens if cellulose is reacted with maleic anhydride C4H2O3? Again, how is the cellulose molecule/structure altered and what are the reaction by-products?
what must a solute's distribution ratio be if 99% of the solute in a 50ml sample is to be extracted with (a) a single 50 ml portion of an organic solvent. (b)two 25 ml portions of the organic solvent
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