What is hydroxide ion concentration in an aqueous solution with a hydrogen ion concentration of 2.70 x 10^-2 M?

What overall charge must all compounds have

Kc = 0.040 for the system below at 450oc. if a reaction is initiated with 0.40 mole of cl2 and 0.40 mole of pcl3 in a 2.0 liter container, what is the equilibrium concentration of cl2 in the same system? pcl5(g) ⇄ pcl3(g) + cl2(g)

Which statement can best be concluded from the ideal gas law?