Question

which of the following demonstrates a chemical change? (1 point)
o iron (fe) reacting to water((h₂o)) and oxygen(o) to form iron oxide(fe₂o₃)
o steam condensing on a mirror
o sugar and water mixing to create sugar water
o dry ice vaporizing

Explanation:

A chemical change results in the formation of a new substance with different chemical properties. Iron reacting with water and oxygen to form iron oxide is a chemical reaction as a new compound (iron oxide) is created. Steam condensing is a physical change (change of state from gas to liquid). Sugar - water is a mixture, a physical combination. Dry - ice vaporizing is a physical change (sublimation, change from solid to gas).

Answer:

iron (Fe) reacting to water((H₂O)) and oxygen(O) to form iron oxide(Fe₂O₃)