A mixture of the compounds aluminum bromide and magnesium, Ask an Expert

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A mixture of the compounds aluminum bromide and magnesium oxide contains 0.381 g of aluminum and is 89.7 % by mass magnesium oxide. The compound aluminum bromide is 89.9 % by mass bromine. The compound magnesium oxide is 39.7 % by mass oxygen. Calculate the mass (g) of bromine in mixture.

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