What is the hydroxide concentration of a 0.10 molar solution of ammonia at equilibrium if its ka is 5.62 x 10⁻¹⁰?
a. 1.33 x 10⁻² molar
b. 1.33 x 10⁻³ molar
c. 3.17 x 10⁻¹² molar
d. 3.17 x 10⁻⁸ molar
e. 7.50 x 10⁻⁶ molar