A 25.0 mL sample of 0.175 M CH3NH2 is titrated with 0.150 M HCl. What is the most likely pH of the resulting solution after the addition of only 5.0 mL HCl to the CH3NH2?

Which theory was contradicted by experiments with the photoelectric effect? light spreads out after it passes through a small opening. as soon as light strikes metal, electrons will be ejected. visible light, regardless of color, will cause the ejection of electrons when striking metal. the kinetic energy of ejected electrons depends on the frequency of light that strikes the metal.