Which is most likely true about water in chemical systems
a.) water dissolves nonpolar ionic compounds
b.)water dissociates ionic compounds
c.)water dissociates covalent molecules.
d.) water dissolves nonpolar covalent substances.

B.) Water dissociates ionic compounds

Explanation: The solubility of substances is governed by: Like dissolves like, which states that polar compounds are soluble in polar solvents and non polar compounds are soluble in non polar solvents.

Water being polar in nature dissolves ionic compounds by getting between the oppositely charged ions of solute and thus decreasing the forces of attraction between the ions. The ions of solute get further apart and start interacting with the oppositely charged poles of water and thus dissolves in water.

it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.