Conditionals

If you heat water, it boils. 100% true.

If you drive, I will tell you the way. (If you drive, I will give directions/I will direct you)

If I moved out, I would be happier (imaginary situation.) For something like this you can either put it in brackets, or if not you should write it as a full sentence e.g. Describe an imaginary situation. If I moved out today I would be happier.

I could do my homeworks (plural of homework is the same as singular) because I haven´t gone to the party (situation that has already happened and that are is impossible to change.) 

If I had gone to the party I wouldn't have been able to do my homeworks. It This means that I did my homeworks because I didn't go to the party.
If I had had (no this isn't a mistake by me :) the chance I would have gone to the party. It means that I couldn´t go because I had no chance.

'If I had the chance' means if you have the chance in the future.

So it would be 'If I had the chance, I would go to the party'.

You use 'had had' if you want to talk about the party in the past as you are here because you used 'gone'.

Corrections welcome!

Conditionals

If you heat water, it boils. 100% true. (note: depends on the temperature you heat the water [If you heat water it gets hot])

If you drive, I will tell you the way.
If I moved out, I would be happier. (Imaginary situation.)
I could do my homework because I hadn´t gone to the party. (Situation that has already happened and that is impossible to change.)
If I had gone to the party I wouldn´t have done my homework. (This means that I did my homework because I didn´t go to the party.) 
Corrections welcome!