goldeneagle1
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Alex saw a rusty old car in an abandoned lot. Because he had recently read about chemical reactions, he began to wonder how the rust formed. What happened to cause the rust on the steel car?

A. A decomposition chemical reaction took place when the iron in the steel mixed with oxygen to form rust.
B. oxygen in the air reacted with the paint on the car and formed rust
C. A physical change took place in the steel of the car to form rust
D. Oxygen in the air chemically combined with iron in the steel to form rust.

Respuesta :

liquidsnake101

The answere is A .......


Oseni

Rust is formed when oxygen chemically reacts with iron in the presence of water.

Recall that steel is an alloy of iron and carbon.

In the case of the steel car, oxygen in the air must have chemically combined with the iron in the steel in the presence of moisture to form the rust according to the equation below:

4Fe(s) + 3O2(g) + 6H2O(l)→ 4Fe(OH)3(s)

Thus, rust is not a physical change nor is it a decomposition reaction.

More on rust can be found here: https://brainly.com/question/18376414?referrer=searchResults

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