Question

Iron + Moisture + Oxygen ------ (____)

Answer 1

Answer:

Rust

Explanation:fe +moisture+O2=rust ie Fe2o3

Answer 2

Fe2O3·nH2O

Explanation:

• Rust is a corrosive iron oxide. It is formed by the redox reaction between the iron and oxygen that is present in the water or the moisture of air.
• The forms of rust can be identified visually.
• It is composed of hydrated iron oxide.  
• The rust is a kind of corrosive element forms over the surface of iron. It affects the quality of the iron makes it brittle and chip like.
• The hydrated iron oxide layer deposit a brown layer over the iron.
• The rust reduces the utilization and price of iron articles.

Learn more about rust:

What is rust where is rust?: https://brainly.in/question/9283222