Drinking rainwater

Q: According to a Hadith, rainwater is shifa for all diseases. Does this also apply to drinking rainwater which has been taken out from the ground? Because when it rains, the rainwater passes through rocks and is stored underground and taken out through machines for drinking. So is it necessary to collect and drink the rainwater before it falls to the ground or will the underground water also have the same benefits for Shifa?

Inheritance

Q: My friend is living in America. She was a divorcee with one daughter who lives with her father. Her mother is staying with her and is partly paralyzed. She has one brother who is living in Pakistan. Recently she was diagnosed with cancer. As in America, if you do not make a will then everything goes to the state so she married a Muslim man so that he could take care of her assets. I wanted to know by what percentage will her wealth be divided according to Islamic law?

Enjoying lawful things in Jannah

Q: In Islam we can't eat pork because it is unlawful... well in jannat are we going to be allowed to eat pork because everything that has been unlawful on earth will be made lawful in jannah right? For example, woman can't dress up in nude clothing in this world but in the hereafter they will be allowed right? So pork will be allowed too in jannah right? 

Will telling one's wife "here's your keys bye bye" constitute divorce?

Q: One time me and my wife were arguing because she kept accusing me of loving another woman which was not true so I got angry and said "here's your house keys and your car keys bye bye". I was angry and I left the house. I wanted to go to my family's house but after walking about 10 minutes I said to myself "why are you going to your family's house just go back home" then I walked back to my wife's house and we said sorry to each other. Is this divorce because I didn't know what was my intention at that time but I didn't want to say talaaq. So I think I was just angry but I am having waswas thinking what was my intention at that time when I said these words. I think I was only upset with her accusations and wanted her to stop.