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Draw the two possible products of the reaction between benzaldehyde and methylethylketone. (Do not draw the products of the double-condensation.)
A 20 mg sample of zinc is heated at 10 K min-1, and the peak on the DSC trace has an area of 0.371 W K. Calculate the latent heat of melting of zinc (in kJ mol-1)?
How many carbon atoms does the sample contain?
if 69 kJ of heat is applied to a 1012 g block of metal, the temperature of the metal increasesby 11.4 degrees C. Calculate the specific heat capacity of the metal in J/g degrees C.
The balanced reaction has a -2217 kJ. If a steak must absorb 7.2 * 10^-4 kJ to reach a perfect medium rare and only 15% of the heat produced by the barbeque is actually absorbed by the steak, what mass of H2O is emitted into the atmosphere when th..
Hydrogen sulfide decomposes according to the following reaction, for which Kc = 9.30 10-8 at 700°C. 2 H2S(g) 2 H2(g) + S2(g) If 0.33 mol H2S is placed in a 4.7 L container
body scanners used in hospitals operate with 400 radiofrequency energy.How much energy does this correspond to in kilojoules per mole?
A cell that uses bromine to oxidize hydrogen H^+ under standard conditions at 298 K has a positive potential.
72.0 mL of a 1.40 M solution is diluted to a volume of 278 mL. A 139-mL portion of that solution is diluted using 161 mL of water. What is the final concentration.
You have successfully purified a protein to homogeneity. From gel permeation chromatography studies, you determine that the protein has a molecular weight for 235,000 daltons.
Consider the following qualitative analysis scenario and then classify what type(s) of qualitative analysis principle is/are being used. More than one choice may be correct.
Radon (Rn) has a mass number of 222 and an atomic number of 86 and decays by emission of an alpha particle. The product of this decay is, Identify the product of the nuclear reaction by providing its atomic symbol , mass number , and atomic number
Two gas tanks are linked by a connecting tube of negligible volume with a valve. One contains 15 L of nitrogen at 7.2 atm of pressure. The other contains 8.3 L of helium at 4.1 atm of pressure.
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