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Estimate the activation energy of the reaction that causes the souring of milk. How long should it take milk to sour at 45 degrees Celcius.
The heat of solution of lithium carbonate is 3.06kJ/mol solute in 200 moles of H2O. What effect would you expect increased temperature to have on the concentration of Li2CO3 in its saturated solutio
A 4.50 gram sample of LiCl at 25.0 dissolves in 25.o ml of water also at 25.0 Celsius. the final equilibrium temperature of the resulting solution is 60.8 Celsius.
If the solubility of a gas is 7.5 g/L at 404 kPa pressure, what is the solubility of the gas when the pressure is 202 kPa?
"Aqueous solutions of iron(III) chloride and sodium hydroxide are mixed together to form a combined solution that is 0.015 M FeCl3 and 0.010 M NaOH.
1 atm to produce carbon dioxide and water(liquid). If the reaction produces 520KJ of heat, what is the mass percentage of methane in mixture?
You are asked to go into the lab and prepare an acetic acid-sodium acetate buffer solution with a pH of 4.40 ± 0.02. What molar ratio of CH3COONa (conjugate base) to CH3COOH (weak acid) shoul
A sample of neon is collected at 2.7 atm and 12.0 degrees celcius. If has a volume of 2.25 L. What would be the volume of this gas as STP?
How many 3-liter balloons could the 12-L helium tank fill? Keep in mind that an "exhausted" helium tank is not empty.
Carbon oxide (carbon (II) oxide) can be purified of oxygen impurities by having it react with cobalt (II) oxide. If the impure carbon oxide contains a volume of 1.5% oxygen, and if it reacts with co
Assuming no other changes, how would it affect the rate if one simultaneously doubled the concentration of 2-chloro-2-methylpentane and sodium iodide?
What volume and mass of steam at 100 degress celsius and 1.00 atm would release the same amount of energy during condensation as 100. cm ^3 of liquid water would release during freezing?
An aerosol can has a gas pressure of 144 kPa at 293 K. Calculate the pressure when the can is heated to 425 K.
Draw the orbital-energy diagrams and use the spectrochemical series to show orbital occupancy and identify ehether the complexes are diamagnetic or paramagnetic.
A large weather balloon filled with helium as a volume of 7.00 x 102 L at STP. Which expression should be used to find the mass of helium in the balloon?
3.60 bar of NO2 (g) is initially placed in a 1.00 L container. At equilibrium, the total pressure is found to be 4.4 bar. What is the value of Kp under these conditions?
In a reaction at equilibrium the partial presssure of SO2 is 117 torr and that of Cl2 is 255 torr. What is the partial pressure of SO2Cl2 in this mixture?
What mass of sucrose should be combined with 537 of water to make a solution with an osmotic pressure of 8.55 at 275 ?
Consider the titration of 50.0 mL of 0.217 M hydrazoic acid (HN3, Ka = 2.6 x 10-5) with 0.183 M NaOH. Calculate the pH of the solution after addition of 29.7 mL of NaOH solution.
Prepares a mixture of 0.675 M SCl2 and 0.973 M C2H4 and allows it to react at room temperature (20.0 ºC). At equilibrium the concentration of mustard gas at equilibrium is 0.350 M. Calculate Kc
The standard enthalpy of combustion of ethene gas [C2H4] is -1411.1 kJ/mol at 298 K. Given the following enthalpies of formation, calculate delta Hf (final enthalpy) for C2H4.
When a 24.8-g sample of ethyl alcohol (molar mass = 46.07 g/mol) is burned, how much energy is released as heat?
How many grams of water will be produced? What is the limiting reagent? (Be sure to balance equation for this reaction).
During the titration several milliliters of deionized water are added to the Erlenmeyer flask containing the KHP solution. How will this affect the calculated concentration of NaOH (too high, too lo
At a temperature T, a previously empty 5.00L flask is prepared by adding 1.20 mol SO2 and 1.5 mol of O2. Determine the concentrations of SO2, O2 and SO3 once equilibrium is established. KC=963,