#1
There are a few open chords that i really like the sound of, but only know these and want to play more that sound like it. They are
e|-------------------0-------------------------
b|-------------------3---------------3-----------
g|-----2------------0---------------0-------0---
d|-----0------------4---------------4-------0-----
a|-----4------------0---------------5-------4-----
e|-----0-------------------------------------5-----
clapton plays them in change the world, after E7 and A7, respectively.Two are from metallica's sanitarium and bryan adam's run to you, any help is appreciated thanks.
#2
The first one is very dissonant. It has a Db, D and E in it, which clash big time.

The second is also somewhat dissonant. If I had to name it, I'd call it an A7sus add6.

The third is Dadd4.

The last is A7add4.