Question

a 6.0 m base produces 0.25 m $oh^-$ in solution. is this a strong or a weak base?
weak base! the concentration of $oh^-$ is significantly less than the concentration of the base.
strong base! the base produces $oh^-$ in solution.
its not possible to determine this without the chemical formula of the base.
weak base! the majority of the base reacts with water to produce $oh^-$ ions.

Explanation:

A strong base completely dissociates in solution. If a 6.0 M base is strong, the concentration of $OH^-$ ions should be close to 6.0 M. Since the $OH^-$ concentration is only 0.25 M which is significantly less than the base concentration, it indicates incomplete dissociation, characteristic of a weak base.

Answer:

Weak base! The concentration of $OH^-$ is significantly less than the concentration of the base.