9. Razona (en al menos dos líneas) la verdad o falsedad de las
afirmaciones siguientes. (0.5 puntos)
a. Todas las sustancias covalentes están formadas por moléculas.
b. Las moléculas de los metales tienen muchos átomos.
c. Un enlace covalente consiste en un par de electrones
compartido por dos átomos.
d. Un compuesto iónico sólido es un buen conductor de la
corriente eléctrica en cualquier situación.

When an object falls through the air and encounters air resistance its overall speed will be than if it had not encountered air resistance? (one word answer)

Consider the story you just read. all but one of the choices below indicate that something is living.

How do cfcs cause ozone depletion? how do cfcs cause ozone depletion? ultraviolet radiation breaks down cfcs, molecules containing chlorine. chlorine then breaks one oxygen atom away from ozone, leaving behind a paired oxygen molecule. ultraviolet radiation breaks down cfcs, molecules containing chlorine. chlorine then breaks two oxygen atoms away from ozone, leaving behind a paired oxygen molecule. ultraviolet radiation creates cfcs, molecules containing chlorine. chlorine then breaks two oxygen atoms away from ozone, leaving behind a paired oxygen molecule. ultraviolet radiation creates cfcs, molecules containing chlorine. chlorine then breaks one oxygen atom away from ozone, leaving behind a paired oxygen molecule.