state three reasons why you think air is a mixture and water is a compound.

state two reasons for supposing that brass is a mixture and not a compound.

Give three reasons why air is considered a mixture and not a compound.

Explain why , air is considered a mixture and not a compound.

List any three reasons why would you think that you are sick and ought to see a doctor. If only one of these symptoms were present, would you still go to the doctor ? Why or why not ?