For the reaction: 2H20(1) - 137 kcal - 2H2(g) + O2(3), how many kcal are needed to form 2.00 moles O2(g)?
A) 685 kcal
B) 190. kcal C) 137 kcal
D) 548 kcal
E) 274 kcal

The  grandmother cell  is a hypothetical  neuronthat represents a complex but specific concept or object.[1]  it activates when a person "sees, hears, or otherwise sensibly discriminates"[2]  a specific entity, such as his or her grandmother. the term was in use at least as early as 1966 amongst staff and students in the department of experimental psychology, university of cambridge, england. a similar concept, that of the  gnostic neuron, was proposed two years later

Ithink 2 is the correct

Aphysical change is one that you can put in and remove like a ham sandwich. the stuff you put in there can be changem its not permanet. a chemical change is on that can't be change thats permanet. like when you make a cake and bake it. you can't get those ingredients back.

The think of process to make something successful