The theory of evolution was proposed by Darwin.
Ions. Im 99.9% sure haha.
A reaction in which oxidation numbers change is the answer! :D
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∆H for given reaction -847kJ
- As it's negative reaction is exothermic
So
2 mol of Al releases 847KJ heat
4 mol Al releases
∆H=-1694KJ
I have no idea, but i’m pretty sure you gotta divide