Can God ignore the natural laws that govern physics, chemistry, etc...scientific laws?
No, because physical laws don't govern -- they describe.To illustrate this, pick any "law of the universe" you like.
The law of gravity, you say? Fine. The law of gravity says that all objects in Texas will be drawn toward the earth: that a downward force will be exerted upon them (proportional to their mass, and inversely proportional to the square of their distance from the earth's core, roughly speaking).
Now suppose we find a magic rock just outside of Houston -- one that has a mass of four kilograms, but has no gravitational attraction to the earth at all. It floats in mid-air, accelerating in no particular direction until someone sneezes at it (causing it to accelerate away from the sneezer).
Is this magic rock disobeying a law of the universe?
It is not acting in a manner consistent with Newton's or Einstein's theories of gravity, that's for sure. Does that mean Newton is right and the rock is wrong? Or does it mean that Newton is wrong?
Obviously, it's the latter. Newton and Einstein's theories of gravity would have to be revised to account for our observations of this magic rock.
So the rock didn't disobey a law of the universe: it merely showed that Newton's "law" of gravity was not really a law after all.
The same would be true for an apparent violation of any physical law -- whether by a rock or by a god. Physical "laws" are just descriptions of how the universe works. As such, they are not
obeyed or
disobeyed; rather, they are
accurate or
inaccurate. And if they are inaccurate, they are not really laws.