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Hemiketals can be formed under both basic and acidic conditions while ketals require acidic conditions for their formation. Starting with acetone, provide a mechanism that explains this observation.
A balloon vendor at a street fair is using a tank of helium to fillher balloons. The tank has a volume of 150.0 L and a pressureof 120.0 atm at 25 degree celsius. After a while she notices that the
Knowing that a second ionization energy of Cesium is 25.05 eV,what is the wave length of UV light required to eject electrons from the 2nd ionization of a sample of cesium with a speed of 0.2 x10 ^
Calculate the lattice energy of calcium chloride given that the heat of sublimation of CA is 121 kJ/mol and enthalpy of formationof CaCl2 = -795 kJ/mol.
Bright sunlight corresponds to radiation incident on the surfaceof Earth at about 1 kW m-2. What percentage of this energy can be "harvested" as carbohydrate in photosynthesis?
How many molecules of O2 are used to burn up all the wax? What mass of liqid water is produced when the wax burns? What volume od CO2g is produces if the reaction occurs atstp?
The π electrons in benzene can be approximated as particles ona ring. Calculate the diameter of this "electron ring" if it is assumed that a transitionoccurring at 260.0 nm corresponds to an elec
What volume (in L) would the released CO2 occupy at 1.00 atm and25 degrees Celsius? (kH for CO2 at 25 degreesCelsius is 3.30 *10-2 mol/L*atm; PCO2in air is 3 * 10-4 atm)
According to the concentrations in the PROCEDURE and assuming thatyou are assigned to work with 1 mL of barium chloride,calculate the theoretical number of grams of barium sulfate that should be pro
A mixture of sodium chloride, ammonium chloride and silicon dioxide are first extracted with water and then the extract and the insoluble residue both heated to dryness.
Chlorine has two stable isotopes of mass 34.97 u and 36.97 u.Suppose the percent abundance of the lighter isotope were 66.32%.What would be the atomic mass of Cl?
How could you separate zinc chloride and zinc sulfide? Napthalene sublimes easily, but potassium bromide does not. How could you separate these two substances?
The best design for rockets is one in which both fuel materials runout at the same time to minimize excess mass. If the total mass ofboth components in a decaborane/oxygen rocket must be 4.291×
Suppose that the enzyme you are studying is regulated by phosphorylation. When the enzyme is phosphorylated, the Km for its substrate increases by a factor of 3, but Vmax is unaltered.
Polyethylene can be chlorinated by inducing a random substitution of chlorine atoms for hydrogen. What is the concentration of Cl (in wt%) if this substitution occurs for 15% of all original hydrog
This is actually the sum of two half reactions. The sum of ahydrolysis reaction coupled to a condensation reaction isthermodynamically equivalent to the ligase reaction represented bythe overall rea
DNA structure, called the i-motif can be formed from sequences containing stretches of cytosine (C) residues. In this structure protonated C forms a noncanonical base pair with anunprotonated C.
Human hairs have diameters between 17 and 180 μm. For a hair that has a 72.0 μm diameter, how many can fit between a pair of teeth on a comb that are 0.150 inches apart ?
Suppose a reaction mixture, when diluted with water, afforded 300mLof an aqueous solution of 30g of the reaction product malononitrile[CH2(CN2)], which is to be isolated by extraction with ether.
At 25ο C, an aqueous solution containing 35.0wt% H2SO4 has a specific gravity of 1.2563. Aquantity of the 35% solution is needed that contains 195.5kg ofH2SO4.
Calculate how much 95% ethyl alcohol will be required to dissolve0.1g of sulfanilamide at 78 degrees celsius and Using the volume calculated in the previous question.
How many grams of propane must be burned in order to convert2.32moles of water at 56.0 oC to steam at 100.0 The enthalpy of combustion of progane is 2044.0 kJ/mole
Calculate the mean free path and the collision frequency ofcarbon dioxide molecules using the collision cross-section ofσ=0.52nm^2 at 10atm,25,50 and 100 degrees C.
Acrylonitrile is an important building block for synthetic fibers and plastics. Over 2 billion pounds of acrylonitrile are producedin the United States each year. The compound is synthesized from pr
Elemental sulfur occurs as octatomic molecules, S8. What mass of fluorine gas is needed for complete reaction with 293.89 gsulfur to form sulfur hexaflouride?