it has to be a fair ball, and go over the fence. if a fan reaches over the fence and catches the ball, the umpires can call it back. If you had some violation such as being out of the box when you hit the ball or if you had two much pine tar on your bat, the umpires can call that back as well.
Yes
only one earned run and that's the home run, the other runs arent his fault but the home run is.
yes
The batter is credited with a home run in his personal statistics (and the pitcher is charged with allowing one,) but no runs score.
If appealed by the defending team the player who did not touch home, his run would not count and he would be ruled out. In the even that this runner was the 3rd out of the inning -- his run wouldn't count as well as anyone who touched home after him
Yes they due. If it were any other hit, only the winning run or runs count.
3-2.
I believe so, but i'm not 100% sure. yes because it is still a home run
1 ball and no strikes.
Yes. And so do the other six he hit after that.
It could if two bases had players on them, because 2+1=3
If a batter hits a home run, he can automatically run around all the bases and the team gets a point. If there are any runners already on the bases, then they count as points too. This is why you can have two-run home runs and 3-run home runs. If the bases are loaded, and the player at bat hits a home run, then the team gets four points. This is called a grand slam.