When conducting this experiment some procedures call for heating the substance several times and recording the mass after each heating continuing until the mass values are constant .explain the purpose and how it might reduce error.

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What overall charge must all compounds have

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.