What is the density of a sample of ore that has a mass of 58 g and occupies 26.8 cm3?

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How many grams of aluminum will there be in 98g of al2o3?

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.