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  • TLC lab

  • how do i determine the long wavelength limit?

    How to determine long wavelength limit?i have a absorption diagram of a photoconductor, how do i determine the long wavelength limit?

  • What would be the result of the reaction of the compound with HBr?

    What would be the result of the reaction of the compound with HBr?

  • How many MG atoms are in an MG sample with a mass of 2.071x10(to the)4 amu

    I just have no idea how to approach this.

  • calculate solution pH

    A solution containing 0.125M of a weak base (pKb = 5.00) is to be titrated using 0.568M HClO4.Calculate the solution pH at 2.00% of Ve, and at 5.00mL past Ve.I calculated the equiv point to be 22.01mLs, but I do not know for sure how to finish. Can you explain steps for before and after e.p.??

  • solubility product constants

    Now consider the reverse reaction,Cu(NH3)42+ Cu2+ + 4NH3What is the equilibrium constant for this reaction? 10Begining with the "final" concentrations from the table above AND taking equilibrium into account this time, please complete the following reaction table.Cu(NH3)42+ Cu2+ + 4NH3initial 11M 12M 13M14M 15M 16Mequilibrium 17M 18M 19MWhat percentage of the original Cu2+ is still present as free Cu2+ after addition of the NH3? 20 %So, how good was the original assumption that all the Cu2+ would be present as Cu(NH3)42+?

  • Ka and pH

    the pH of a 0.300 M soln of HCN is 5.20. Calculate the Ka value for HCN. Is the answer 1.32 x 10^-10 ?

  • Predicting products

    Predict the structure for the major monobrominated product of the compound below.PLEASE show the structure and explain your work. WILL RATE LIFESAVER

  • Nuclear Chemistry

    What charge (in Coulombs) is required to oxidize 1.0 g of silver to silver(I) ions? (F = 96480 C/mol e?)

  • Precipitation

    A 75.0mL. sample of 1.48*10-2 MNa2S04 (aq) is added to 75.0mL. of1.22*10-2 M Ca(NO3)2 (aq). What percentageofCa2+ remains unprecipitated?

  • Help on Lattice Points

    Sketch the [1-10] direction within the (111) plane realtive to a fcc unit cell. Include all atom-center positions within the plane of interest

  • write the name of the organic product....please help!!!

    Write the name of the major organic product obtained from thereaction between: a) styrene and 1 mol H2 over Pdb) butylbenzene and sodium dichromate (Na2Cr2O7) in thepresence of acidc) m-nitroisopropylbenzene and potassium permanganate(KMnO4) in the presence of waterfollowed by acid

  • Name of the product

    Type in the name of the organicproduct Aproduced by the reactionbelow.

  • NMR coupling

  • Banana

    A sample of bananas in water is found to have a [H3O1+] = 2.51 x 10-5M. What is the pH of the solution? Are bananas acidic (A), basic (B), or neutral (N)?

  • Organic Chemistry

    Indicate the product of this acid-base reaction: HCL + CH3=O=CH3

  • Diels Alder Rxns

    Can someone please help me? I don't understand this at all.Draw the exo and endo product for the reaction of cyclopentadiene and maleic anhydride. Which one will be favored?

  • Chemically equivalent protons

    How many different sets of chemically equivalent protons are present?(CH3)3H

  • pH

    HCl(g) was dissolved in a 0.080M KCN solution until the Cl- concentration was 0.010M. What is the pH of the solution? (HCN pKa=9.22)

  • How would each of the following affect the accuracy of the calculated neutralizing power of antacid (too high, too low, or no effect) a

    How would each of the following affect the accuracy of the calculated neutralizing power of antacid (too high, too low, or no effect) a. The titration flask was wet with distilled water when the antacid was added. b. The buret was not rinsed with NaOH solution before titrating, and water was in the tip. c. The antacid was not cut in half exactly before weighing. d. The solution mixture of reacted antacid and excess HCl spattered out of the flask during boiling.