Nitric acid is made from ammonia in three steps. First, 4 NH₃ + 5 O₂ → 4 NO + 6 H₂O, which converts 90% of the ammonia. Second, 2 NO + O₂ → 2 NO₂, which is complete. Third, 3 NO₂ + H₂O → 2 HNO₃ + NO, which is complete, and the NO it releases is not collected. Starting from 34.0 g of NH₃, what mass of HNO₃ is made? Atomic masses in g mol⁻¹: H 1.0, N 14.0, O 16.0.

ChemistryAdvancedHigh School (11–12)Chemical Reactions › Chemical Equations Olympiad

Nitric acid is made from ammonia in three steps. First, $4\,\text{NH}_3 + 5\,\text{O}_2 \rightarrow 4\,\text{NO} + 6\,\text{H}_2\text{O}$ , which converts $90\%$ of the ammonia. Second, $2\,\text{NO} + \text{O}_2 \rightarrow 2\,\text{NO}_2$ , which is complete. Third, $3\,\text{NO}_2 + \text{H}_2\text{O} \rightarrow 2\,\text{HNO}_3 + \text{NO}$ , which is complete, and the NO it releases is not collected. Starting from $34.0\ \text{g}$ of $\text{NH}_3$ , what mass of $\text{HNO}_3$ is made? Atomic masses in $\text{g mol}^{-1}$ : H 1.0, N 14.0, O 16.0.

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← Potassium chlorate is heated with a little manganese dioxide: 2 KClO₃ → 2 KCl + 3 O₂. The oxygen from 0.490 g of KClO₃ is collected over water at 300 K, at a total pressure of 1.00 atm. The vapour pressure of water at this temperature is 0.036 atm. Take R = 0.0821 L atm K⁻¹ mol⁻¹. What volume of moist gas is collected? Atomic masses in g mol⁻¹: O 16.0, K 39.0, Cl 35.5.A metal M of mass 0.600 g dissolves in dilute acid and gives 0.560 L of hydrogen at STP, where 11.2 L of hydrogen is one equivalent. The vapour density of the metal chloride, relative to hydrogen, is 47.5. What is the atomic mass of M? Atomic masses in g mol⁻¹: Cl 35.5. →

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