This depends on the specific application of a material.
If there is no salt or substance that makes it impure it is a pure mixture
If a substance in a mixture is preponderant--, if the amount far exceeds the amounts of the other substances in the mixture it is usually called an impure substance. Resource: Separation of the Components of a Mixture Lab -Chemistry
Yes Baking Powder Is A Pure Substance.
impure because they are made of more than 1 substance
yes water is mixture of many impure substances and bacteria.even pure water has some bacterias.
Generally an impure material is cheaper than a pure material; the word advantage is not so adequate here - can use pure or impure, this depends on the specific applications.
No, a suspension is not a pure substance. It is a mixture of particles dispersed in a liquid, where the particles are not fully dissolved and can be seen with the naked eye.
It depends on what you're trying to accomplish. Helium is a pure substance. Corn flakes are a mixture. If you're trying to blow up balloons, the pure substance has one huge advantage over the mixture: balloons filled with corn flakes are no fun. But if it's 6 am and you want to eat breakfast, you'd better stick to the mixture.
mixture
pure substance?
Any processed food is made of impure elements, solutions, colloids, suspensions, and compounds.
A substance might be pure with a single compound or impure with impurities along with principal compounds.