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Question 29 An exchange reaction is carried out using a solution of aqueous lead (II) nitrate. A precipitate is formed by adding a solution containing excess sodium hydroxide. The mass of the precipitate was found to be 5.2 grams. What was the concentration of the original lead nitrate solution if its original volume was 87 ml? 2NaOH(aq)+Pb(NO3)2(aq) Pb(OH),(s)+2NaNO (aq)

Question 30 Solid lithium hydroxide reacts with carbon dioxide gas to produce solid lithium carbonate and water. What mass of reactant is left over when 63.9 g of lithium hydroxide is allowed to react with 34 g of carbon dioxide? Assume complete reaction to products