Ayúdame con la tarea
Prepara una solución de 250 ml de cloruro de sodio al 0.9%

Draw the skeletal structures of two different molecules that are each made of 5 carbon atoms and 12 hydrogen atoms.

How can carbon move from "land" to bodies of water? describe the way human impact has lead to increased levels of co2 in the atmosphere.

Element before carbon on the periodic table