A high school girl was getting ready for a big date but discovered with horror that her silver necklace was tarnished. Having just studied about redox reactions and electrochemical cells in chemistry class, she grabbed some aluminum foil, put it in a dish, and placed her necklace on top of the foil. Then she added some baking soda, a little salt, and hot water. Within a few minutes, her necklace was bright and shiny again. The formula for silver tarnish is Ag2S. Use the balanced equation to answer the following questions: 3Ag2S + 2Al(s) Al2S3 + 6Ag(s) a. What makes this an oxidation-reduction reaction? (1 point) b. Write the half-reactions showing the oxidation and reduction reactions. Identify which is the oxidation reaction and which is the reduction reaction. (3 points) c. What is oxidized in the reaction? What is reduced? (2 points) d. In this simple electrochemical cell, what functions as the anode? What is the cathode? (3 points) e. Is this a galvanic cell or electrolytic cell? Explain your answer. (2 points) f. What would the overall potential for this cell be? (4 points)

The Judiciary: Pretrial, Bail, Plea bargaining, and Trial

The judiciary is an important part of the criminal justice system. After the police arrest an individual, an extensive chain of events is set off in the American court system.

1. Explain what a grand jury is to your classmates. How does a grand jury work and who is involved in the process?
2. Only a handful of cases result in a jury trial. Outline the steps involved in a criminal trial. Why do so few cases end up going to trial?                                                                                                                                                                                                                                                                                                                                        Instructions for Discussion Question: Your initial post should be at least 250 words in length. Support your claims with examples from the required material(s) and/or other scholarly resources, and properly cite any references. 

Summarize three of the subsections within section 6.5.1. Why did you choose the three subsections you summarized? What was most significant about their content? The authors indicate a mean volume of 4.2×10⁶ Î¼m³ for a single alveolus. Please verify (or disprove) this number, using another source (and provide the reference). If the mean volume of 4.2×10⁶ Î¼m³ is correct, and the volume can be approximated in the shape of a cube, what is the length of the side of the cube? 

An archeologist unearths a skeleton of a mastodon. Analysis shows the skeleton to a carbon-14 activity of 2 cmp (counts per minute per gram). If we know the skeleton had an initial carbon-14 activity of 16 cpm when the mastodon died and that the half-life of caron-14 is 5730 years. How long ago did the mastodon die?