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Which molecular compound could be dinitrogen monoxide?

Between HI and HF, which has the higher boiling point, and why?

For the galvanic cell at 298 K: Zn(s) + 2In2+(aq) → Zn2+(aq) + 2In+(aq)   Eocell = 0.36 V What is the equilibrium constant, K?  

For the synthesis of nitrogen dioxide, NO2: 2N2(g) + O2(g) → 2NO2(g) If this reaction has the energy diagram shown below, what is the spontaneity of the reaction?  

What is the geometry around the central atom in the following molecular model of CCl4?

If a 1.0 L flask is filled with 0.22 mol of N2 and 0.22 mol of O2 at 2000°C, what is [NO] after the reaction establishes equilibrium? Kc = 0.10 at 2000°C N2(g) + O2(g) ⇌ 2NO(g)

For the galvanic cell: Zn(s) + 2Tl+(aq) → 2Tl(s) + Zn2+(aq)   Eocell = 0.42 V If the standard reduction potential for: Zn2+(aq) + 2e– → Zn(s)   Eored = –0.76 V What is the standard reduction potential for: Tl+(aq) + e– → Tl(s)   Eored = ? V

Which element is represented by ?

When the reaction: A + 2B → C was studied, the experimental data was obtained and plotted. Based on these graphs, what is the experimental rate law?  

How much heat is evolved or absorbed when 25.0 g of silver oxidizes to form silver oxide (Ag2O) under standard conditions? The enthalpy of formation (ΔHfo) of Ag2O is –31.05 kJ/mol and the molar mass of silver is 107.87 g/mol.