Question: How did Hank's wife Janet survive all those years in the quantum realm?
Answer: Hank asks Janet a question about the energy from her hands, and she hints that the quantum realm changes you: not just adaptation but evolution (or mutation!) which gave her certain abilities which may have helped her survive. It's also hinted that she was involved with/accepted into a civilization which existed in the quantum realm and you see a city in the distance as they depart.
Question: When Zuri disarmed Killmonger, why didn't he kill him? That would've been a lot smarter than letting him kill him. He easily could've done it.
Answer: Zuri feels guilty for his role in the death of Killmonger's father, which is why he tells Killmonger to kill him instead of T'Challa. While Zuri himself probably doesn't actually want to die, I don't think he wants Killmonger dead either, which is why he wouldn't kill him. Also, as a royal advisor, it would probably be looked down upon by the other tribes if he violated the rules of the ritual combat. After all, one combatant has to defeat the other in order to rightfully claim the throne.
Zuri may not want Killmonger to die, but he knew that the duel would only end once one of the contestants would either surrender or die, meaning Killmonger would stil win or kill T'Challa. It seems a rather low price to be looked down upon or fired if it means your country doesn't go to war. At least, that would be a small price to pay for keeping the peace.
Answer: From what I've read, they are chanting "yibambe," which is Xhosa for "we hold our ground."
Phaneron ★