2kl(aq)+cl(g) 2kcl (aq) +l2(g) how many moles of l2 are produced

Coefficients   in the reaction show numbers of moles in with substances are react or form.
2Kl(aq)+Cl2(g) > 2KCl (aq) + l2(g)
2 mol     1 mol          2 mol           1 mol
If we look at the reaction we can see that from 2 mol KI and 1 mol Cl2, form 2 mol KCl and 1 mol I2.

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