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Determine the wavelength of the light absorbed when an electron in a hydrogen atom makes a transition from an orbital in the n=3 level to an orbital in the n=7 level.
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When a device is used in a circuit in which the voltage is 81 v the current flowing through the device is 3 a what is the resistance of the device
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Match each state of matter with the statement that best describes it.
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2. Can you say that the matter which underwent a chemical change is still the
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