Moles and Grams from Grams Exercise \(\PageIndex{1}\) For the balanced chemical equation Al(s) + 3Ag + (aq) → Al 3+ (aq) + 3Ag(s) how many moles and grams of Ag are produced when 0.661 mol of Al are reacted? Answer \(0.661 mol Al*\left ( \frac{3 mol Ag}{1 mol Al} \right )= 1.98 mol Ag\) \(0.661 mol Al*\left ( \frac{3 mol Ag}{1 mol Al} \right )*\left ( \frac{107.8682 g Ag}{1 mol Ag} \right )=214 grams Ag\) Exercise \(\PageIndex{2}\) For the balanced chemical reaction 4NH 3 (g) + 5O 2 (g) → 4NO(g) + 6H 2 O(ℓ) how many moles and grams of H 2 O are produced when 0.669 mol of NH 3 react? Answer 1.00 mol H 2 O, 18.0 grams of H 2 O Moles and grams from grams Exercise \(\PageIndex{3}\) For the balanced chemical reaction 4NaOH(aq) + 2S(s) + 3O 2 (g) → 2Na 2 SO 4 (aq) + 2H 2 O(ℓ) how many moles and grams of Na 2 SO 4 are formed when 1.22 grams of O 2 react? Answer \(1.22 g O_{2}*\left ( \frac{1 mol O_{2}}{31.988 g O_{2}} \right )*\left ( \frac{2 mol Na_{2}SO_{4}}{3 mol O_{2}} \right )= 0.0254 mol Na_{2}SO_{4}\) \(1.22 g O_{2}*\left ( \frac{1 mol O_{2}}{31.988 g O_{2}} \right )*\left ( \frac{2 mol Na_{2}SO_{4}}{3 mol O_{2}} \right )*\left ( \frac{142.04314 g Na_{2}SO_{4}}{1 mol Na_{2}SO_{4}} \right )=3.61 g Na_{2}SO_{4}\) Exercise \(\PageIndex{4}\) For the balanced chemical reaction 4KO 2 (s) + 2CO 2 (g) → 2K 2 CO 3 (s) + 3O 2 (g) determine the number of moles and grams of both products formed when 6.88 grams of KO 2 react. Answer Moles: 0.0484 mol K 2 CO 3 , 0.0726 mol O 2 Grams: 6.69 grams K 2 CO 3 , 2.32 grams O 2