Paying for one's divorced wife's expenses during her iddah period

Q: If 2 people are divorced. The girl moves to another town. The ex husband tells his ex brother in law to ask a mufti in his area twice to ask how much iddah money I have to give. But he doesnt ask and says its ok about the money. But I said, no I have to give as its my right. Then he says ok. Do I still have to give? As my ex brother in law is a moulana and he knows its the right of the ex husband to give iddah money. He still didnt ask a mufti. But I gave for 1 month.

Touching a cloth with dry napaak hands

Q: I have read that in order for najasat to transfer from one place to another, flowing wetness needs to be transferred. Now if my hands are not paak but dry, and I hold a cloth in my hand, does it become napaak?? The point where I am confused is that a hand is always sweating and in bright light very tiny droplets of sweat are always visible. Now if in such a scenario, if I touch a cloth, given my hands are not paak but apparently dry and I cannot see any wetness transferred to the cloth, does the cloth remain paak? Does this situation correlate with the ruling that a najsat with size less than a dirham coin could be ignored?

Inheritance

Q: My question is about inheritance according to Islamic Shari'a law. I have a stepmother who has no kids, I have one brother and one sister. What would be the inheritance share from a deceased man in case of two sons, one daughter and wife (our step mother) who has no kids. Our mother died long time ago.

Washing dried semen

Q: I had released semen at night which had dried on my private area when I woke up in morning. When I did ghusl, the dried semen was not coming out, even after scratching or rubbing the skin. I left it and completed my ghusl, and offered fajr. This dried semen did not come out until I scratched it again after a week, and even then I think it did not come out completely.

1. Does this dried semen keep me impure?

2. Will I have to repeat the prayers I offered with this?