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Use data for the N2O4 / NO2– (base) and N2O4 / HNO2 (acid) couples to determine Ka for HNO2. volt-equivalancy of Ka of HNO2 Ka of HNO2? District line train services on tuesday 18/10/17? What is the enthalpy change for the first reaction?
Fe2O3(s) → 2Fe(s) + 3/2O2(g) ΔH = 4Fe(s) + 3O2(g) → 2Fe2O3 (s) ΔH = -1,648 kJ? Integrate dx/cos^2 (x)? How many negative roots does the equation 3x^4 - 2x^3 + 8x^2 - x- 7 = 0 have?