Part B If you take a 13.5-mL portion of the stock solution and dilute it to a total volume of 0.400L, what will be the concentration of the final solution

Answerd. may include all of these are many definitions of bases: the  brønsted-lowry definition of acids and bases says that bases are proton acceptors.the arrhenius definition of acids and bases says that bases increase [oh⁻] in solution (thereby producing oh⁻ ions)the lewis definition of acids and bases says that bases donate electron pairs.therefore, the sensible answer is that a base may include all of the described characteristics.

Idont know. if you want an answer you need to give us some context dude.