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The collision (frequency) factor remains the same, by how much an enzyme lower the activation energy of the reaction in order to achive 1 x 10 ^5 fold increase in the reaction rate
Xenon gas is released during a certain chemical reaction and pushes back the atmosphere with a change in volume of the vessel (it has a movable piston) from 2 to 20 Liters. Calculate the work done b
Suppose an additional gaseous component, e.g. helium, is pumped into the system, keeping the volume of the container fixed, until the final pressure is 100 atm. Assume that the helium does not disso
The vapor pressure of pure liquid A at 300K is 575torr and that of liquid B at 300K is 390torr. The molar volume of A is 0.0262L/mol and that of liquid B is 0.0306L/mol. Calculate the final partial
Calculate the work done if a gas is compressed from 7.7 L to 1.3 L at constant temperature by a constant pressure of 2.6 atm, and give your answer in units of joules. (1 L · atm = 101.3 J) J
Calculate the heat evolved when 231 g of white phosphorus (P4) burns in air according to the equation below.
a 51 kg person drinks 490. g of milk, which has a "caloric" value of approximately 3.0 kJ/g. If only 17% of the energy in milk is converted to mechanical work, how high (in meters) can the person cl
Calculate the expansion work done against a constant external pressure of 0.969 atm and at a constant temperature of 24°C. Assume that the initial volume of dry ice is negligible and that CO2 be
A person ate 0.919 pound of cheese (an energy intake of 7350 kJ). Suppose that none of the energy was stored in his body. What mass (in grams) of water would he need to perspire in order to maintain
A solution is prepared with initial concentrations of .038 M AL^3+ and .29 M NaF. If the Kf for AlF6^3- is 7.0 * 10^19, what is the concentration of Al^3+ (aq) at equilibrium?
Write the mechanism for the formation of 4-chlorobenzanilide from the combination of the following reagents:
In the (unbalanced) photosynthesis reaction above, Fill in the Blank 01 kg of glucose are produced if 44 kg of carbon dioxide are consumed. Make sure to balance the equation first.
Calculate the pH of a solution prepared by mixing 50mL of a 0.10 M CH3NH2 solution with 25mL of a .20M HCl solution. (Kb CH3NH2 = 4.4 x 10^-4)
If you want to prepare a buffer with a pH of 4.30 with HOAc (acetic acid) and NaOac, what ration of NaOAc/HoAc should you use? (pKa of HOAc is 4.74)
If a solution is made by mixing 20.0mL .4M NaCH3COO with 30mL .4 CH3COOH, calculate the pH for acetic acid, Ka = 1.76x10^-5.
The change in enthalpy (delta S standard) for a reaction is -31.7 kJ/mol. The equilibrium constant for the reaction is 4.4×103 at 298 K. What is the equilibrium constant for the reaction at 64
Diagnostic reactions are those used in medicine to figure out what may be causing a problem. Can you go into detail concerning one such test you or someone you know has undergone? Share one balanced
What did you observe in the reactions of zinc with 4 different acids: HCL, H2SO4, H3PO4, and CH3COOH
dissolved in enough water to make 250.0 mL of solution. Write the hydrolyis reaction for the ion that controls the pH, and calculate the pH
What is the hydroniem ion concentration in a solution resulting from mixing 193mL of .100M HCN and 22mL of .100M KOH at 25C? Ka for HCN=4.9x10-10
Write a balanced equation including states of matter for the reaction of Zn(H2O)4 in aqueous NaCN.
Calculate the partial pressure of each, the total pressure and the composition of the liquid solution.
A solution was prepared by dissolving 10.12g of KCl.MgCl2 (277.85g/mol) in a sufficient water to give 2L. Calculate a.) the molar analytical concentration KCl. MgCl2 in this solution
How many grams of sodium lactate should be added to 1.00 L of 0.150 M lactic acid to form a buffer solution with pH= 4.00? Assume that no volume change occurs when the sodium lactate is added.
Titration of the I2 produced from .1045g of primary standard KIO3 required 30.72ml of sodium thiosulfate, Calculate the concentration of the Na2S2O3