Bats and marine mammals are able to locate prey and to communicate by sending and receiving soundwaves that echo off of surfaces. Echoes demonstrate the wave property of

the electron configuration that you gave me has 16 electrons ergo it has 16 protons ergo it is the element sulfur.

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.