The amplitude of a wave tells you how fast the wave is moving. True False
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There are a total of 40 valence electrons in the PCl5 Lewis structure. Remember when you draw the Lewis structure for PCl5 that Phosphorous (P) is in Period 3 on the Periodic table. This means that it can hold more than 8 valence electrons.
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Workings are in the picture! first you get moles of Fe2O3, then you get moles of Al and then you get mass of Al!
