The chemical formula for the reddish powder known as rust is Fe₂O₃. What does this formula indicate about the composition of the substance?

It is a simple mixture of two iron atoms and three oxygen atoms that can be easily separated.

For every two iron atoms, there are three oxygen atoms that are chemically bonded together.

The substance is mostly made of iron, with a small amount of oxygen impurity.

It contains five atoms in total, with more iron than oxygen.

Iron oxide is described as having a repeating "extended structure." What does this term imply about how the iron and oxygen atoms are arranged?

The atoms are arranged in small, separate groups of five that float around independently.

The iron and oxygen atoms are linked in a large, continuous, and repeating crystal-like network.

The atoms are randomly mixed together without any specific order or pattern.

The substance is a gas where individual atoms move freely and are far apart from each other.

The rust is simply iron that has been crushed into a fine powder.

The iron atoms in rust have chemically bonded with oxygen, forming a new substance with new properties.

The rust is older than the nail, and its properties have changed over time.

There is no real difference; the color change is just on the surface.

To provide a tool for physically building the substance in a classroom.

To create an exact, full-scale replica of the atoms.

To make the substance look more interesting than it is.

To visualize a structure that is too small to be seen with the naked eye.

The sample is reddish in color.

The atoms are chemically bonded together in a fixed ratio.

The sample was found on a piece of metal.

The sample contains more oxygen atoms than iron atoms.