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A radioactive element has a half-life of 2.2 hours. How many hours will it take for the number of atoms present to decay to one-sixteenth of the initial value? Show your calculations please.
Draw the structure(s) of the epoxide(s) you would obtain by formation of a bromohydrin from cis-3-heptene, followed by treatment with base
Dibenzalacetone has two carbon-carbon double bonds. How many geometric isomers are possible? Draw all possible geometric isomers of the product and look up their melting points.
Calculate the range of pH values for which Mg(OH)2 will not precipitate but Fe(OH)3 will. Assume the solution is 0.0500 M
A sealed balloon is filled with 2.20 L of helium at 23°C and 1.00 atm. The balloon rises to a point in the atmosphere where the pressure is 210. torr and the temperature is -32°C. What is the change in volume of the balloon as it ascends from 1.00..
H2s and H20 have similar structures and their central atoms belong to the same group. Yet H2S is a gas at room temperature and H20 is a liquid. Use bonding principals to expalin why this is.
draw the major form of your drug whenph is low (acidic medium) for all acid base groups c. draw the major form of drug when ph is high (basic medium for all acid base groups
The Henry's Law constant (k) for carbon monoxide in water at 25ºC is 9.71 x 10-4 mol/(L•atm). How many grams of CO will dissolve in 1.00 L of water if the partial pressure of CO is 2.75 atm?
Calculate delta G for this reaction at 25 C under the following conditions. Pco2 = 0.100 atm Pccl4 = 0.165 atm Pcocl2 = 0.755 atm express answer in KJ please show work as well
Calculate the molar mass of sucrose. How many mol sucrose did you start with in this lab?
Suppose that you titrate 50.00 mL of a 0.0200 M Fe3+ solution (buffered at pH = 4.00) with 0.100 M EDTA. For all questions below, I am looking for a nonzero numbers.
one hundred grams of water is saturated with NH4CLat 50 degrees C. According to table G, if the temperature is lowered to 10 degrees , what is the total amount of NH4CL that will precipitate?
Solve an equilibrium problem (using an ICE table) to calculate the pH of a solution that is 0.185 M in HC2H3O2 and 0.120 M in KC2H3O2
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