A sample of 0.2 moles of magnesium bromide. What is the number of moles of magnesium ions and bromide ions?

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The answer is 0.2 moles

Firstly write the half ionic equation of MgBr2 (magnesium bromide). MgBr2 arrow Mg^2+ + 2Br^- Then write the molar ratio of MgBr2 and Mg^2+ which is 1:1. Therefore the number of moles of Mg^2+ is 0.2 moles

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