Using the concept of electroneutrality and the cahrge on an O ion- indicate the charge of the mystery cation X in the following IONIC compound.  XO2

Draw the electron dot (Lewis) structures for N2, O2, and F2 in order to answer the following question(s).  (1) Describe the difference in bonding within these molecules (what do your correct Lewis structures look like?). Be sure to indicate how many bonds, what types of bonds and the location of any lone pairs of electrons.  (2) Discuss number of bonded and non bonded electrons AND the distribution of electron density (polarity!) around the molecule.

Grégoire parle à Vincent.

Grégoire parle à Raphaël.

Grégoire parle à Cécile.

According to Screwtape, the Enemy’s throne/position in the patient’s life depends upon the patient’s understanding of 

Standard disclaimer: your solution should use the algorithms from class (DFS, BFS, Dijkstra’s, Topological Sort, Bellman-Ford, Floyd-Warshall, SCC, Kruskal’s, Prim’s, Ford-Fulkerson, Edmonds-Karp, and 2-SAT) as a black box subroutine for your algorithm. If you attempt to modify one of these algorithms you will not receive full credit, even if it is correct. Make sure to explain your algorithm in words (no pseudocode!), explain the correctness of your design, and state and analyze its running time. Faster—and correct—solutions are worth more credit. You are given a connected, undirected, weighted graph G=(V,E) with distinct edge weights w(e), and a Minimum Spanning Tree T of G. An edge e’ that is in T is deleted from G, creating a new graph G’=(V,E’). This is, G’ has the same set of vertices and exactly one less edge.  Design an algorithm to produce an MST of G’. Your algorithm must return False if G’ has no MST.  

Degree of saturation is defined as the ratio of:

Which of the following is NOT a category of soil particle shape?

Match the characteristic with corresponding type of prototype