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A .350g sample of a large biomolocule was dissolved in 15g of Chloroform and the freezing point depression was determined to be .24 degrees C. Calculate the moloar mass of the biomolocule. (Kf for Chloroform is 4.70 degrees C kg/mol)
Distinguishing between Organic Molecules, What chemical tests might be used to distinguish between: pentanal and 2-pentanone, between benzyl alcohol and diphenylmethanol?
the bright-red color of highway safety flares comes from strontium ions in salts such as srno32nbspand srco3. burning a
Explain the use of beta-alanine? Is it used as a H+ source, or something else? Why can malonic acid be reacted in V-D modification, while only its ester can be reacted in standard Knoevenagel condensation conditions?
standard-state free energy of formation data to calculate the acid-dissociation equilibrium constant
A current of 3.88 A is pass through a Ni(NO3)2 solution. How long (in hours) would this current have to be applied to plate out 6.60 g of nickel
the titration of 40.0ml of 0.200M HONH2 (Kb=1.1 x 10-3) by 0.100 M HNO2. Calculate the pH of the resulting solution after the following volumes of HNO3 have been added
an iron bar of mass 869 - g cools from 90 oc to 5 oc gt calculate the heat released in kilojoules by the metal.
What is the absolute pressure in a lake 90.00 meters under water (? = 1.00 g/mL) when the atmospheric pressure is 101.325 kPa?
How many lone pairs of electrons are there in a molecule of crotononitrile?
95.0mL of rm H_2O is initially at room temperature (22.0rm{} ^{circ}C). A chilled steel rod at 2.0rm ^{circ}C is placed in the water. If the final temperature of the system is 21.4^{circ}C.
What is the equilibrium concentration of HXY4 ^2- for a 0.15 M solution of the triprotic acid, H3XY4?
A student combusts 504.96 grams of ethene gas, C2H4. How many liters of CO2 (g) are produced at a pressure of 0.993 atm and a temperature of 295 K? C2H4 (g) + 3 O2 (g)-> 2 CO2 (g) + 2 H2O (g)
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