For which one of the following is the enthalpy of the reaction the same as the enthalpy of formation?.

Deanna just finished high school she wants to work in the health science career cluster but is not interested in moving on to post secondary education which career would deanna best be suited for

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

Scientists observed a rock stratum with fossil. if mollusks evolved before arthropod, where will their fossils be found.