You mix two unknown chemicals together and notice the temperature drops from 45°C to
15°C. Is the reaction endothermic or
exothermic? How do you know?
-evious

whats the meaning of /

nanotechnology is a powerful tool in biomaterials research as it creates numerous possibilities for the engineering of functional molecules. nano-bio refers to projected ability to incorporate biomimicry into various materials at nanoscale.  

the positions which points up in upward carbon and down in downward carbon are axial

and vice versa holds true for equatorial positions

so the correct answer with labelled diagram will be

може ли да зареждате повече информация, моля