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An unknown carbohydrate of formula C12H22O11 reacts with Tollens reagent to form a silver mirror. An a glycosidase has no effect on the carbohydrate, but ß-glycosidase hydrolyzes it to D-galactose and D-mannose. When the carbohydrate is methylated (using methyl iodide and silver oxide) and then hydrolyzed with dilute HCl, the products are 2,3,4,6-tetra-O-methylgalactose and 2,3,4-tri-O-methylmannose. Propose a structure for this unknown carbohydrate.
find the normal boiling point of a saturated solution of lif at 100c assuming it un- dergoes complete dissociation. the
the total volume of the gas bags of the german dirigible hindenberg, was 2.0 * 10^5m^3. how many grams of H2 would be required to fill them at 20 celcius and 1.00 atm pressure? hint convert m^3>cm^3>mL>L.
Discuss the advantages and disadvantages of discretion in relation to the criminal justice system. Give examples, while discussing the pros and cons.
For steady flow in a heat exchanger at just about atmospheric pressure, explain what is the heat transferred. Explain when 20 mol of ammonia is heated from 100 to 800 deg. C
If in a distillation apparatus does the water enter the condenser at the hose connection closer to the receiving flask or closer to the reaction pot. Define why it is important that it be this way.
K a for aspirin (acetylsalicyclic acid) is 3.0 x 10 -4 at 25°C. What is the the acetylsalicylate anion, the conjugate base of aspirin?
suppose that a coal-fired power plant converts energy from coal into electrical energy with 36 percent efficiency. how
The electron transport chain complexes that have higher electron affinities steal electrons from those with lower electron affinities.
Problem- Using the value of Ksp for Ag2S, Ka1 and Ka2 for H2S, and Kf = 1.1 105 for AgCl2-, calculate the equilibrium constant for the following reaction. Ag2S(s) + 4 Cl-(aq) + 2 H+(aq) 2 AgCl2-(aq) + H2S(aq)
How many electrons must aluminum lose before it can reach a stable electronic configuration? Use the table of ionization energy to justify your answer.
A solution is ready by adding some solid PbCl2 to water as well as allowing the solid to come to equilibrium with the solution. Explain the equilibrium constant for the reaction below is Kc = 1.7x10^-5.
If I have 31.0 g of lithium hydroxide dissolved to make 3 L of a solution, what is the molarity of the solution
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