(a) in the cracking of dicyclopentadiene (bp = 1700c), why is important to correctly adjust the heater temperature so that the thermometer reading stays as close as possible to 410c? (b) if the temperature abruptly increases to 650c, can the distillate that has been already collected still be used in the diels-alder reaction with maleic anhydride? explain your answer.

Of the groups of elements below, which are most likely to gain electrons to become anions? a. alkali metal b. boron group c. halogen d. transition metal

Asubstance is held in an open container. its particles move past one another at random speeds but do not leave the container. heat is removed from the system, and the particles slow down. when enough heat is removed, the particles no longer have enough speed to overcome the weak attractive forces between them. when this happens, the substance enters its solid state. the process described above is known as .

How is an endothermic reaction identified