As you learned in the module, investigating arson can be a very complicated and complex job! It is also generally a time sensitive matter. Forensic scientists who investigate arson must not only act quickly but also methodically. In order to practice how you would respond during an arson investigation, you will be creating a ‘game plan’ or ‘fire investigation timeline’ for what you would do upon arriving at the scene of a fire. Using what you learned in the module as well as any necessary online research, you should articulate each step that would take place during your investigation. Be sure to number your steps and keep in mind any unexpected situations that might occur.

Suppose a lab group reports a ppercent yield of sand of 105. is it really possible to collect more sand than was originally represented? what is the possible explanation for the extra product?

The scheme below is from a series of reactions that are part of a synthesis of vitamin a. answer the following questions with reference to this scheme. (i) what is "reagent a"? (ii) draw a step-by-step mechanism which explains the formation of compound c from compound b (iii) which reagents would you use to form compound e from compounds c and d (reagents b and c)? for each reagent suggested above in (ii) explain the role of the reagent in the reaction to (iv) form compound e. you may wish to do this by drawing a mechanism. 1. addition of reagent a но reagent a 2. н,о" thо oh нон-с compound a. compound b. compound c .ch-оh 1. reagent b "сно 2. reagent c сh oh compound e. compound d.

An alloy contains 66 g of pure zinc. what is the percentage of zinc in the alloy? express your answer to two significant figures and include the appropriate units.