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II. 3K2S(aq)+2AuCl(aq)AuS(s)+6KCl(aq) 1. This is a precipitation reaction between potassium sulfide and gold(III) chloride. How many moles of gold (III) chloride is needed to completely react with 25.0 mol of potassium sulfide? ( 3 points). 2. If 12.6g of KCl is obtained from this reaction, how many grams of AuCl3 was used in the reaction? (5 points). 3. If 5.00g of potassium sulfide and 5.00g of gold(III) chloride are used for the reaction, then what is the theoretical yield of KCl in moles that can be prepared? What is the limiting reactant? What is the excess reactant? 4. Ammonia, carbon dioxide and water vapor react to form ammonium bicarbonate as follows: NH3(g)+CO2(aq)+H2O(1)NH4HCO3(aq) Suppose 50.0g of NH3,80.0gCO2 and 2 moles of H2O reacted, what is the percentage yield of NH4HCO3 if about 121.50g of was actually isolated