Hubbert’s Peak refers to one of the largest open coal mines in the history of mankind.

The extraction of tar sands and oil shale has a relatively low environmental impact.

A solution containing CaCl2 is mixed with a solution of Li2C2O4 (lithium oxalate) to form a solution that is 2.1 × 10^-5 M in calcium ion and 4.75 × 10^-5 M in oxalate ion. What will happen once these solutions are mixed? Ksp (CaC2O4) = 2.3 × 10^-9.

What is the magnitude of the change in pH when 0.005 moles of HCl is added to 0.100 L of a buffer solution that is 0.100 M in CH3CO2H (acetic acid) and 0.100 M CH3CO2Na .The Ka for acetic acid is 1.8 x 10-5.

What is the hydronium ion concentration of a 0.150 M hypochlorous acid solution with Ka = 3.5 × 10-8? The equation for the dissociation of hypochlorous acid is: HOCl(aq) + H2O(l) ⇌ H3O+(aq) + OCl-(aq)

What is the frequency of the source if a moving observer traveling toward the source at a velocity of 1.75 m/s hears a frequency of 425 Hz?  (velocity of sound = 343 m/s)  

The value of Keq for the equilibrium ; CO2 (g) + 2H2 (g) CH3OH (g) is 14.5 at 483 °C. What is the value of Keq for the equilibrium below? ½ CO2 + H2 (g) ½ CH3OH (g).

What is the pH of the resulting solution if 30.00 mL of 0.10 M acetic acid is added to 10.00 mL of 0.10 M NaOH? Assume that the volumes of the solutions are additive. Ka = 1.8 × 10-5 for CH3CO2H. SHOW YOUR WORK

Consider the following reaction at equilibrium: 2NH3 (g)   N2 (g) + 3H2 (g) ΔH° = +92.4 kJ. Le Châtelier’s principle predicts that removing N2 (g) to the system at equilibrium will result in ______.

If Kc = 7.04 × 10-2 for the reaction: 2 HBr(g) ⇌ H2(g) + Br2(g) what is the value of Kc for the reaction: ½ H2(g) + ½ Br2 (g) ⇄ HBr (g) ?