Final answer:
Without additional information regarding the concentration and identity of the other solution, it is not possible to calculate how many milliliters of 0.250 M NaOH are required to neutralize 30.4 mL of a solution.
Step-by-step explanation:
To determine how many milliliters of 0.250 M NaOH are required to neutralize 30.4 mL of an unknown solution, we would need to know the concentration and identity of the other solution. Without this information, we cannot calculate the exact volume of NaOH needed.
However, assuming that the '30.4' refers to milliliters of a certain molar solution of an acid with a 1:1 molar ratio with NaOH, we would use the formula:
M1V1 = M2V2
Where M1 is the molarity of the acid, V1 is the volume of the acid, M2 is the molarity of the base (NaOH), and V2 is the volume of the base. Since we are missing the molarity of the acid (M1), we cannot proceed with the calculation. If '30.4' represents something else, additional clarification is needed to provide the correct answer.