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A chemist has synthesized two new dyes based on the molecular structure of plant-based dyes. The lowest energy absorption line for one dye is light in the discernible region at 530 nm. The lowest energy absorption line in favor of the other dye is light in the visible region at 645 nm. Based on this evidence, explain which molecule has the higher HOMO-LUMO gap?
write a complete ionic equation and if there is a phase change you need to then write a net ionic equation and list the spectator ions copper (ii) sulfate plus silver nitrate equals copper (ii) nitrate and silver sulfate
What is the hydronium-ion concentration of a 4.07 10-4 M solution of p-bromobenzoic acid, BrC6H4COOH, for which Ka = 1.00 10-4
what is the phase of matter of the solute and solvent of sterling silver?
1 write the aldol product that would be obtained if dibenzylketone condensed with itself. only a single condensation.
phosphoric acid can be prepared by reaction of sulfuric acid with phosphate rock according to the equation ca3po42
Calculate the mass of vapour present in a room of volume 250 meter cube that contains air at a temperature of 23 degree centigrade on a day when the relative humidity is 53%.
calculate the amount of heat required to completely sublime 88.0 g of solid dry ice co2 at its sublimation temperature.
Mercury (I) cyanide is a severely toxic substance with a Ksp of 3.8x10^-40. If the following solutions are combined, what is the final concentration of cyanide? i. 500. mL of a 0.47 M Hg2(NO3)2 solution; ii. 500. mL of a 0.77 M NaCN solution
Based on the first and fourth sketches(Part C figure) , what is the density of the block? First sketch shows mass of the block = 50g. Second sketch shows block completely immersed in water(at 20 degree Celsius), mass of block now = 5.6g and densit..
Explain the Delta H for this reaction is 54.8 kJ. Explain how much energy would be absorbed if 27.1 g of NH_4Cl reacts
Cyclopropane has significantly less angle strain than cyclopropane, yet is only slightly lower in energy. How can this be true? How does this information relate to the fact that cyclobutane is not a planar molecule
Calculate delta G in Joules/mol at 25 C when concentration of [H] is .00000010 M and [OH] is 1.0 x 10^-11.
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