Created by StemPy LabRed lead, (molar mass ), is a mixed oxide that contains lead in two oxidation states. A sample is warmed with excess dilute . The insoluble residue is filtered off, washed and then warmed with excess concentrated . What volume of is released in this second step? Measure it at STP, taking the molar volume as .
← All Quizzes
← Pauling's relation gives |χ_A - χ_B| = 0.102√(Δ), where Δ (in kJ mol⁻¹) is the extra bond energy of A-B over the geometric mean of the A-A and B-B bond energies. The bond dissociation energies are: A-A 90 kJ mol⁻¹, B-B 360 kJ mol⁻¹, A-B 318 kJ mol⁻¹. In the AB molecule the B atom carries the partial negative charge, and χ_B = 3.2. Find 10χ_A. The answer is an integer; round to the nearest whole number.Consider these ten oxides: BeO, MgO, B₂O₃, Ga₂O₃, ZnO, SnO₂, CO, Cr₂O₃, CrO₃ and Mn₂O₇. Each oxide belongs to exactly one class: acidic, basic, amphoteric or neutral. Let a be the number of amphoteric oxides and b the number of acidic oxides in the list. What is the value of 10a + b? The answer is an integer; give it exactly, with no rounding. →
Discussion (0)
Log in to join the discussion.
Loading…