If there is no salt or substance that makes it impure it is a pure mixture
It makes a mixture.
I think it's the same mechanical mixture.
Neither, a cooper is someone that traditionally makes barrels.
An element - substance - NOT a mixture.
a mixture is not a substance
a mixture is not a substance
It's a pure substance because even though the atoms are different they still the same. If that makes sense?
No, it is a mixture; rarely a drug is a pure substance.
a compound is made up of more than one pure substance and a mixture is things mixed toghter
a mixture
No. To start with, air is not a pure substance, and mixiong it with something else just makes it worse.