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Chemistry as question

Given that water in the Dead Sea has a bromide ion concentration of 5.2g dm-3 and a chloride ion concentration of 208g dm-3.

Calculate the concentration in mol dm-3 for bromide ions in Dead Sea water
concentration = 5.2/79.9 = 0.0651 mol/dm^3

79.9 is the relative atomic mass of bromine

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