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A particular first-order reaction has a rate constant of 1.35 x10^2 s^-1 at 25 degrees Celsius. What is the magnitude of k at 75.0 degress Celsius if Ea= 85.6 kJ/mol?
Calculate the heat required to raise the temperature of 125 g of water are heated from 20.0oC to 100oC based on a specific heat of water of 4.184 J/g oC.
Estimate the triple point pressure and teperature of water, given that the standard enthalpies of fusion and vaporization are 6008 J/mol and 43990 J/g at 273.15 K and 298.15 K, repectively
A 45 kg person drinks 530. g of milk, which has a "caloric" value of approximately 3.0 kJ/g. If only 15% of the energy in milk is converted to mechanical work, how high (in meters) can the person climb based on this energy intake?
2.00 l of h2 at a pressure of 368 torr and 1.00 l of n2 at an unknown pressure. if the total pressure in the flasks is
Sample has a mass of 0.171 g at a pressure of 761 mm Hg and a temperature of 32oC. What is the molar mass of the gas? R=0.0821 L atm / mol K
An aqueous solution contains 167 g CuSO4 in 820 mL of solution. Calculate the : a. Molarity b. Percent by mass c. Mole fraction d. Molality of the solution, The density of the solution is 1.195 g/mL
The enthalpy of fusion of methanol is 3.16 kJ/mol. How much heat would be absorbed or released upon freezing 25.6 grams of methanol
Enough of a monoprotic acid is dissolved in water to produce a 0.0126 M solution. The pH of the resulting solution is 6.38. calculate the Ka for the acid
Acetic Acid is a weak acid with a Ka value of 1.8x10^-5. What concentrationof acetic acid is needed to produce a [H+] of 3.5x10^-4?
1. why should the funnel be removed from the top of the burette while titration is being berformed?2. while the
Calculate the amount of heat energy (q) gained or lost when 180g of water is cooled from 65.0*C to 28.5*C. What is the sign of q for this calculation
In an acid-base titration experiment, a 0.2 M solution of HCl was titrated at 25°C with a 0.05 M solution o KOH. Here the equilibrium constant for the titration reaction had this value:
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