Bacterial drug resistance is becoming a problem in hospitals worldwide. "Superbugs" like MRSA and C. difficile are very difficult to treat and are showing up more and more in the human population. Many scientists believe that overuse of antibacterial medications has led to the
speedy evolution of these drug-resistant bacteria.
These drug-resistant bacteria become more common in the population through a series of steps. Number the steps from first to last.
= Drug-resistant bacteria build a large population in the host.
= A single bacterium develops a resistance to the drug due to a random genetic mutation.
= The host transmits the drug-resistant bacteria to the outside world.
= An antibacterial drug is used to treat an infection which kills off many honresistant bacteria.

Which of these sequences lists the correct order for the creation of sedimentary rock from sediment? a. deposition, burial, compaction, cementation b. burial, deposition, compaction, cementation c. compaction, deposition, burial, cementation d. cementation, deposition, burial, compaction

Electrons are extremely important to what area of technology? a) anti-aging research b) household product development c) electronics d) drug discovery

Straightforward questions answered in the powerpoint slidesreaction: heating the starting materials under refluxwhat does it mean to heat under reflux? why do we choose water as the reflux solvent? what are boiling chips used for? why do we put a condenser on top of the reaction? why do we add heat and let the reaction stir for 30 minutes? why do we add sulfuric acid to the reaction after it cools as opposed to when it’s still hot? separation: filtration of precipitatewhy don’t we do an aqueous and organic extraction in the separatory funnel? why do you rinse the salicylic acid on the filter with ice cold water? purification: recrystallization of salicylic acid (no hot filtration needed)what is the difference in the amount of room temperature water vs. boiling water needed to dissolve the salicylic acid (assume a 1.2 gram yield of salicylic acid)? remember, in the lab if you need x ml of boiling water to dissolve a solid, then you should add a little more (definitely no more than 1.5 times the theoretical amount) to ensure it doesn’t recrystallize prematurely.analysis: melting point of salicylic acidwhat can you conclude if the melting point of the salicylic acid you just synthesized is 152-155oc and the 1: 1 mix of your product and “synthetic” salicylic acid is 151-154oc?