Is Pascals law valid for gases?

Answer 1

"In the physical sciences, Pascal's law or Pascal's principle states that the fluid pressure at all points in a connected body of an incompressible fluid at rest, which are at the same absolute height, are the same, even if additional pressure is applied on the fluid at some place"

From Wikipedia, the free, online encyclopedia at:
http://en.wikipedia.org/wiki/Pascal%27s_law

The law only applies to incompressible fluids, not compressible gases.

Hope this helps!

Answer 2

surely not, It is applied for fluids