Resuelve Los siguientes problemas. 1. Corrosión de metales: Uno de los metales que se oxida fácilmente es el hierro (Fe), se nota cuando se
forma una capa (óxido) de color rojizo llamado herrumbre. Determina la cantidad de Oxido férrico que se
obtiene si se oxidan 20 g de hierro. Considera que la reacción química presente es:
Fe + O2 + H2O - FezO3 + H2O
2. Fermentación: Los azúcares frutales se fermentan y se transforman en diversos alcoholes. La fermentación
es causada por mohos, bacterias y levaduras, que se encuentran en el aire, el proceso químico de la
fermentación alcohólica se representa de la siguiente manera:
C6H12O6 + enzimas de levadura 2002 + CH3 -CH2-OH
Glucosa
alcohol etilico
Si se desea preparar 300 gramos de alcohol etílico ¿Cuántos gramos de glucosa se deben poner a
fermentar?

3. Combustión: Cada vez que enciendes la estufa lo que ocurre es la combustión de un hidrocarburo.
Combustión es en palabras simples quemar en este caso el hidrocarburo del gas con el oxígeno del aire.
La reacción quimica es:
CaHø + 502 BCO2 + 4H2O
Hidrocarburo
¿Cuántos gramos de dióxido de carbono se producen si se quema 25 gramos del hidrocarburo?​

Quickly! brainliest if two people answer! 1. the blood has red blood cells, white blood cells and platelets. red blood cells carry oxygen to other cells in the body. cells need oxygen to live. white blood cells destroy certain germs. they protect our bodies from disease. which question is answered in this paragraph? (a) what is the role of blood vessels? (b) what type of cells are attached to bones? (c) what type of blood cell to clot your blood? (d) what are the different types of blood cells? 2. which sentence from the section "stem cells" best explains the role of stem cells? (a) when one kind of cell stops working, stem cells can . (b) they can turn into that cell and take its place. (c) scientists are studying new ways to use stem cells. (d) these cells can people heal faster. 3. read the selection from the section "nerve cells." nerve cells send messages to the rest of our bodies. these messages move between the brain, spinal cord and various organs. nerve cells are also called neurons. fill in the blank. a "neuron" is a (a) cell that moves information from the brain to other parts of the body (b) stem cell that has both an axon and a dendrite (c) cell that controls the fingers of a body (d) cell that makes up the spinal cord 4. some muscles in our body move without us telling them to. these are called involuntary muscles. some examples are the cardiac muscle cells inside the heart. these cells the heart relax and fill with blood. what is the best definition of "involuntary" based on the context clues? (a) something that happens on its own (b) trying hard to do something (c) something moving back and forth (d) easily moved

The three types is stress that act on earths rocks are compression, tension, and

Which statement best describes the function of enzymes?