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The dissolution of in water is endothermic, with = +33.5. If you prepare a 1.00 solution of beginning with water at 22.5, what is the final temperature of the solution (in )? Assume that the specific heats of both pure and the solution are the same, 4.18 .
Why should you store the crucible plus sample in a desiccator after heating and before weighing? why should you heat the sample to constant mass?
a 1.728g sample of pbcd alloy was dissolved in acid and diluted to exactly 500ml. titration of a 25.00ml aliquot at a
By what factor does the reaction rate increase at 25oC when the catalyst is used. Assume that the Arrhenius pre-exponential factor, A, is the same for the catalyzed and uncatalyzed reactions.
predict the ratio of the two masses of oxygen that combine with a fixed mass of lead to form PbO and PbO2? PbO:PbO2 oxygen mass ratio= ?/?
At standard temperature, a gas has a volume of 335 mL. The temperature is then increased to 123 degrees celcius, and the pressure is held constant. What is the new volume
Salicylic acid reacts with acetic anhydride at the phenol group rather than at the carboxylic acid group. Briefly explain why the phenol site is preferred over the carboxylic acid site.
Using only the common 20 amino acids, how many differnt 4-amino acid-long polypeptides could be made?
Find out the required pressure to compress 180 liters of N at 1.0 atm into a tank whose volume is 34 liters.
Styrene is produced by catalytic dehydrogenation of ethylbenzene at high temperature in the presence of superheated steam. A.) Given the following data, what is the delta Hrxn, delta Grxn and delta Srxn at 298 K
In what direction do the functions point? What orbitals are"left" unused on the C atom?
Calculate the concentration of the Na2S2O3 solution if 30.70 mL of a 0.2210 M I2 solution react exactly with a 100.0 mL sample of the Na2S2O3 solution.
A doctor prescribes 3 g of a drug, daily, for a patient. The pharmacist has only 750-mg tablets available. How many tablets will the patient take daily
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