A mixture of CH₂Cl₂ (A) and CHCl3 (B) with XA = 0.373 has a total vapor pressure of 0.245 bars at 250 K and the mole fraction of CH₂Cl₂ (A) in the vapor phase is yA = 0.427. Given that the vapor pressure of pure CH₂Cl₂ at 250 K is 0.288 bars, calculate the activity of CH₂Cl₂ in this mixture. Assume that the vapor behaves as an ideal gas.

in the oceans, aqueous calcium ion combines 1:1 with aqueous carbonate ion to yield limestone, a solid.  What is the expression for the Law of Mass Action for the reverse reaction, the dissolution of calcium carbonate into calcium and carbonate ions?  The equilibrium constant for the dissolution of a solid is referred to as Ksp.     Ksp   = limestone/[calcium][carbonate]     Ksp = [calcium][carbonate]/limestone     Ksp = [calcium][carbonate]     Ksp = [calcium]2[carbonate]/limestone

Bromine monochloride is synthesized using the reaction Br, (g) + Cl, (g) = 2BRCI(g) Kp = 1.1 x 10-4 at 150 K A 200.0 L flask initially contains 0.905 kg of Br, and 1.043 kg of Cl,. Calculate the mass of BrCl, in grams, that is present in the reaction mixture at equilibrium. Assume ideal gas behavior. mass of BrCl: What is the percent yield of BrCl? percent yield:

The equilibrium constant in terms of pressures, Kp, for the reaction NH3(g) + HCl(g) 2NH4CI(S) at 340 °C is 4.00. (a) If the partial pressure of ammonia is PNH3 = 0.840 atm and solid ammonium chloride is present, what is the equilibrium partial pressure of hydrogen chloride at 340 °C? PHCI = (b) An excess of solid NH4Cl is added to a container filled with NH3 at 340 °C and a pressure of 1.34 atm. Calculate the pressures of NH3(9) and HCI(g) reached at equilibrium. PNH3 = atm PHCI = atm atm