Use the molar masses of the reactants and the mole ratio to determine the mass of the first reactant:
For each of the following precipitation reactions, calculate how many grams of the first reactant are necessary to completely react with 55.3 g of the second reactant.
2 KI(aq) + Pb(NO3)2(aq) → PbI2(s) + 2 KNO3(aq)
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