Consider a homogeneous mixture, such as a salt solution, and a heterogeneous mixture,
such as rice and pebbles. Suggest and
compare how you could separate the
substances within each type of mixture.

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.

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The number of moles of a given mass of a substance can be found without knowing its molecular formula or molar mass. true false