Which of the pairs below would be the best choice for a ph 5 buffer? hf/naf, k a (hf) = 3. 5 × 10-4 hc2h3o2/kc2h3o2, k a (hc2h3o2) = 1. 8 × 10-5 nh3/nh4cl, k b (nh3) = 1. 8 × 10-5

Increasing line of siam top trave increasing line of sight and path of travel is good idea when driving at higher speeds because it a driver to remain prepared

Two technicians are discussing how to test a car's exhaust by holding a small piece of paper within an inch of the tailpipe mouth. technician a says that if the paper is vibrating due to a "puffing" output from the tailpipe, this signals a smoothly running engine. technician b says that if the paper is being drawn toward the tailpipe, this could indicate burned exhaust valves. who is correct? a. technician b b. both technicians a and b c. technician a d. neither technicians a or b

The structure of adenosine triphosphate (atp) is shown here. which statement best explains how energy stored in the chemical bonds of atp can be released.