Astudent makes several observations about a piece of iron. which observation describes a chemical property of the iron? a. it's mass is 52 grams. b. it's density is 7.9 grams/centimeter³.c. it rusts when exposed to air. d. it conducts electricity. ignore this question as it being in the wrong category, it was an accident as my phone was being laggy wjsjwnndnwn