Acertain ionic compound is made entirely of aluminum and oxygen. part a what is the formula for this compound? express your answer as a chemical formula.

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An electron moved from shell n = 2 to shell n = 1. what most likely happened during the transition? a fraction of a photon was added. a photon of energy was absorbed. a fraction of a photon was removed. a photon of energy was released.

How would the number of moles (n) of o2 change if the atmospheric pressure doubled but all other variables stayed the same