MnO has either the NaCl type structure or the CsCl type structure. The edge length of the MnO unit cell is 4.47 3 1028 cm, and the density of MnO is 5.28 g/cm3. a. Does MnO crystallize in the NaCl type or the CsCl type structure? b. Assuming that the ionic radius of oxygen is 140. pm, estimate the ionic radius of manganese. c. Does the calculated cation-to-anion radius ratio for MnO substantiate your answer in part a? Explain.

Chem 222 notes Week 13 Sample problem: Calculate ΔG for the following reaction at standard conditions: 2Ag +(aq) Cu (s)> 2Ag (s)+ Cu 2+(aq) The standard reduction potential for silver is 0.799, and the standard reduction potential for copper is 0.337. First step: figure out what you have, what you need, and what relationship gets you from what you have to what you need. You have the E for your two reactions, and 0 you need ΔG. ΔG is related to E by the following equation: ΔG=-nFE. E for the complete reaction is the sum of the E of the two half-reactions. One half reaction is going forward, and the other is going backward. In the equation at the top, silver is written as a reduction; thus, its reduction potential is the same as given in the table.