A 1.57-mol sample of oxygen gas is maintained in a 0.650-L container at 296 K. Calculate the pressure of the gas using both the ideal gas law and the van der Waals equation (van der Waals constants for O2 are a = 1.36 L2atm/mol2 and b = 3.18×10-2 L/mol).

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.