We are asked to calculate for the **percent by mass (mass %) of Iodine**in **this mixture** and to do that we’re going to use the **mass percent formula shown** below:

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First, get the moles of I. We do that by doing a mole to mole comparison using KI. We see that for every mole of KI we have 1 mole of I.

In a sample consisting of 1.00 mol NaBr and 0.300 mol KI, what is the mass percent of iodine?

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