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Question: A liter of solution saturated at 25degrees C. with Calcium Oxalate, CaC2O4, Is evaporated to dryness, giving a .0061 gm residue ofCaC2O4. Calculate the conentrations of the Ions, and the molar solubility and the solubility product constant for this salt at 25 degressC. Show Balanced Reaction.
The vapor pressure of pure acetone (propanone) is 266 torr. When a non-volatile solute is added, the vapor pressure of acetone above the solution falls to 232 torr. What is the mole fraction of the non-volatile solute in the solution?
Calculate the standard enthalphy change for the following reaction.
which element has the greatest density at STP? and why?
Why is there a differance in the change in enthalpy and the change in internal engery for the zinc/hydrochloric acid reaction but not for the neutralization reactions
an equilibrium mixture of o2 so2 and so3 contains equal concentration of so2 and so3. calculate the concentration of o2
an average concentration of dissolved gold of 5.8*10^?9 g/L. (a) How many grams of gold are in the ocean? (b) How many m^3 of gold are in the ocean?
Calculate the H3O+ concentration and the PH for the following: a) a solution with OH- concentration= 4.5*10^-4 M? b) a solution with a pH of 5.6
Assuming gasoline is 89.0% isooctane, with a density of 0.692 g/mL, what is the theoretical yield (in grams) of CO2 produced by the combustion of 1.56 x 1010 gallons of gasoline
Suppose we want a soln containing 150 micrograms of the protein at a concentration of .5 mg/ml. To do this we will first evaporate the liquid from enough of the protein soln to get 150 micrograms. How much coln do we need to start with. How much H..
A volume of 1.86 L of H2 is trapped in a nuclear reactor at 870oC and 125 atm. What is the partial pressure (torr) of the H2 after it is released into a container vessel of 2.8 x 104 m3 at 25oC
A buffer solution contains 0.219 M CH3NH3Cl and 0.428 M CH3NH2 (methylamine). Determine the pH change when 0.097 mol HI is added to 1.00 L of the buffer.
a certain first-order reaction has a rate constant of 1.00times10-2 at 45 . how many minutes does it take for the
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