Physical. The chemical compound is not changing, it is still H2O in a different form. Nuclear wouldn’t make sense.
Answer:
D. A reaction or change in a substance that results in a different substance
Explanation:
Chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances.
Density = Mass/Volume
d= 5 / 4.5
Mass, what its made out of, and atomic number