How does a homogeneous mixture differ from a pure substance? How are they similar?

How many homogeneous substances can you reach without moving from where you are sitting right now?

If iron filings are placed with excess powdered sulfur in a beaker, the iron filings are still attracted by a magnet and could be separated from the sulfur with the magnet. Would this combination of iron and sulfur represent amixtureor apure substance?

A cup of coffee is an example of: a. a liquid pure substance b. a gaseous mixture c. a solid pure substance d. a liquid mixture e. a solid mixture

Which of the following particulate illustrations represent pure substances and which represent mixtures?

Which of the following are pure substances and which are mixtures: a table salt; b tap water; c clean, dry air; d steam.

How does an element differ from a compound? How are they similar?

How do molecules of elements and molecules of compounds differ? In what ways are they similar?

The freshly polished brass cylinder in the picture below is a mixture of copper and zinc. Is the cylinder a homogenous or heterogeneous substance?

Some ice cubes are homogeneous and some are heterogeneous. Into which group do ice cubes from your home refrigerator fall? If homogeneous ice cubes are floating on water in a glass, are the contents of the glass homogeneous or heterogeneous? Justify both answers.