Classify the given compounds based on whether δH∘f is equal to zero. Assume all conditions are at standard pressure and temperature.

The ancestors of horses possessed feet with five digits. over time, with the development of grasslands, the digits fused and formed hooves. what evolutionary advantage did this transformation serve? a. it allowed them to climb rocky surfaces with ease. b. it allowed them to graze better. c. it enabled them to run faster from predators. d. it let them see clearly through the grasslands. e. it made them taller.

If you constantly work its possible that you will become burned out at your job?

Suppose you live in location a, a part of the united states with a semiarid climate . you travel to location b, which is in a neighboring area . there you would find a humid continental climate. in which direction is location b likely to be , relative to location a? what is an explanation for the difference