Dinitrogen tetroxide partly breaks up: N₂O₄(g) ⇌ 2 NO₂(g). A sample of the equilibrium mixture has density 2.46 g L⁻¹ at 350 K and 1.00 atm. Take R = 0.0821 L atm K⁻¹ mol⁻¹ and treat the gases as ideal. What percentage of the N₂O₄ originally present has broken up, to the nearest integer? Atomic masses in g mol⁻¹: N 14.0, O 16.0.

ChemistryHardHigh School (11–12)Atoms and Molecules › The Mole Concept Olympiad

Dinitrogen tetroxide partly breaks up: $\text{N}_2\text{O}_4(g) \rightleftharpoons 2\,\text{NO}_2(g)$ . A sample of the equilibrium mixture has density $2.46\ \text{g L}^{-1}$ at $350\ \text{K}$ and $1.00\ \text{atm}$ . Take $R = 0.0821\ \text{L atm K}^{-1}\ \text{mol}^{-1}$ and treat the gases as ideal. What percentage of the $\text{N}_2\text{O}_4$ originally present has broken up, to the nearest integer? Atomic masses in $\text{g mol}^{-1}$ : N 14.0, O 16.0.

Type your answer as a number (a decimal point is allowed). A wrong answer may cost marks.

← All Quizzes

← An ore contains 80.0% by mass of FeS₂. A batch of 60.0 kg of the ore is roasted: 4 FeS₂ + 11 O₂ → 2 Fe₂O₃ + 8 SO₂, and 90.0% of the FeS₂ reacts this way (the rest stays unreacted and gives no SO₂). Next, 2 SO₂ + O₂ → 2 SO₃ converts 95.0% of the SO₂. All the SO₃ then reacts with water: SO₃ + H₂O → H₂SO₄. What mass of H₂SO₄ is formed, in kg, to the nearest integer? Atomic masses in g mol⁻¹: O 16.0, S 32.0, Fe 56.0, H 1.0.A 0.500 g piece of brass (copper and zinc) is dissolved in acid. An excess of KI is added, which reacts only with the copper: 2 Cu²⁺ + 4 I⁻ → 2 CuI + I₂. The iodine set free needs 47.2 mL of 0.100 mol L⁻¹ sodium thiosulfate: I₂ + 2 S₂O₃²⁻ → 2 I⁻ + S₄O₆²⁻. What is the percentage of copper in the brass by mass, to the nearest integer? Atomic masses in g mol⁻¹: Cu 63.5. →

More onAtoms and Molecules › The Mole Concept

Discussion (0)

Loading…

Discussion (0)

Problems on this topic