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A sample of oxygen gas occupies a volume of 555.0 mL at 822 torr and -45?. Calculate the temperature in ? if the gas has a volume of 2.53 L at 491mmHg.
If a person were to say that a scientific finding was replicated, he or she would be saying that the finding was
A 50.0 ml sample of benzene at 16.9 degrees C was cooled to its melting point, 5.5 degrees C and then frozen. How much heat was given off in this process
if the vapor of a volatile liquid of 2.31grams nbspis able to fill a flask of 498-ml at 100 degree celsius and 775 mm
of an apparatus that could be used to electroplate a ton spoon with Ag. Label the anode and cathode, suggest an electrolyte, and write the anode and cathode half reactions. explain how the process takes place.
A gas in a container is expanded by 0.25 of the original volume to a total of 15 dm^3 at constant temperature. The resultant pressure is 20 bar. What was the original pressure before the compression assuming perfect gas behavior
Use a temp-composition diagram to explain why fractional distallation of 2 components is more easily accomplished if the components have boiling points
The amino acid histidine has three pKa's at 1.8, 6.0 and 9.3. In a 0.01 M solution of histidine, what is the concentration of protonated carboxylic acid at pH 7.4? The primary amine? The side chain?
What are the importance of amino acids in physiological processes, in nutrition and in the different uses of these
what is the percent yield of a reaction in which 248 g phosphorus trichloride reacts with excess water to form 126 g
Determine the molar mass of the acid and given that the pH at the half way point to the equivalence is 3.86. Calculate the Ka of the unknown acid.
A lab rat weighs 265 grams and absorbs 1.67*10^13 beta particles eash with an energy of 2.2*10^13u. If relative biological effectiveness is .75 what is the dose. a)1.04*10^-2 sV b)1.3*10^-2 sV c)1.04*10^-5 sV d) 1.39*10^-5 sV e)6.23*10^-13 sV
The carbon atom model has an additional rotational axis of symmetry that is NOT threefold. Use an arrow to show the location of one of these in a figure of the carbon atom model.
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