What is the PH of a solution prepared by dissolving 0.280 mol of benzoic acid and .120 mol of sodium benzoate in water suffiiecient to yield 1.00 L?

Consider the elements bromine and chlorine; which elements has a larger ionic radius ?

2pos suppose an object in free fall is dropped from a building. its starting velocity is 0 m/s. ignoring the effects of air resistance, what is the speed (in m/s) of the object after falling 3 seconds? give your answer as a positive decimal without units. answer here

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.