Another real-world example of a change is rust. rust is iron oxide (fe2o3), which results when iron is exposed to oxygen in the air.

specific gravity is the density of a substance divided by the density of water. since (at standard temperature and pressure) water has a density of 1 gram/cm3, and since all of the units cancel, specific gravity is usually very close to the same value as density

so "c" is the answer

plz give brainliest

the answer is 303.15 or 303

gold is my favorite solid.