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Question- A molecule has two amino groups with pKa values of 9.90 and 7.200. It also has a thiol with a pKa value of 8.20. What is the pI of this molecule? (Use 3 significant digits) Answer
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In a certain experiement, 4.6 g Al is reacted with excess oxygen and 6.8 g of product is obtained according to this reaction: 4 Al + 3 O2 --> 2 Al2O3 What is the theoretical yield for this reaction
structure of the substance to be used in this experiment to initiate free radical chain chlorination
Steam locomotives in the 1950s burned coal containing sulphur which released sulphur dioxide into the atmosphere. Scrubbers could have removed SO2 from flue gases by reaction with calcium carbonate,
What is the final volume in milliliters when 0.780 of a 39.7 (m/v) solution is diluted to 25.0 (m/v)? Express your answer numerically in milliliters.
Addition of HBr to 1-phenylpropene yield only (1-bromopropyl)benzene. Propose a mechanism for the reaction and explain using resonance structures why none of the other regioisomer is produced?
consider a carnot refrigeration cycle with a working fluid of r-134a operating between temperatures of -10oc and 20oc.
A 10.00 mL aliquot of weak base is titrated with HCl. The equivalence point is reached after 17.21 mL of 0.4332 M HCl has been added. The pH is equal to 10.03 after 5.00 mL of HCl was added. Determine:
Write a balanced equation for the reaction of Al(H2O)6^3+ in aqueous KF. Include physical states for each reactant and product
A 100.0 mL sample of 0.10 M NH3 is titrated with 0.10 M HNO3. Determine the pH of the solution after the addition of 150.0 mL of HNO3. The Kb of NH3 is 1.8 × 10-5.
The active ingredient in Pepto-Bismol is bismuth subsalicylate, C7H5Bi04. Anslysis of a 1.500-g sample of Pepto-Bismol yeilds 346 mg of bismuth. What percent by mass is bismuth subsalicylate
how would you make 100ml of a buffer with a pH =4.25, starting with 0.25 M acetic acid and 0.25M sodium acetate
What is the main structural feature of the azo dyes that causes them to be colored compounds?
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