What action is the best example of a direct observation

Identify the electromagnets with poles that are reversed from the electromagnet shown above

The appropriate concentration for an iodine sanitizer is

2-bromo-2-methylbutane undergoes an e1 elimination reaction in the presence of ethanol. in the next reaction only one of the possible products is represented. although the product shown is not the major product of the reaction, notice that there is more than one way it can be produced. complete the mechanism and draw the missing substances.