30.5 mL of a weak base are titrated with 24.3 mL of a strong 1.5 M acid solution. What is the concentration of the weak base before any acid was added?

The size (radius) of an oxygen molecule is about 2.0 ×10−10m. make a rough estimate of the pressure at which the finite volume of the molecules should cause noticeable deviations from ideal-gas behavior at ordinary temperatures (t= 300k ). assume that deviatons would be noticeable when volume of the gas per molecule equals the volume of the molecule itself.