Pure Substance

Question 1

Aspirin pills contain aspirin and some ingredients that don’t have medicinal functions, such as corn starch and cellulose. Based on this, how would you classify an aspirin pill?

Answer 1

Mixture

Question 2

Select the statement that BEST answers the following question based on the information provided.

Milk is uniformly mixed it contains several compounds–water, proteins, fats, and sugars. Is milk considered a substance or a mixture?

Answer 2

It is a mixture that can be separated by physical means

Question 3

Which statement(s) best describe why table sugar is considered a pure substance?

Answer 3

1. Sugar has the same chemical composition throughout
2. A bowl of sugar contains only one compound
3. Sugar cannot be separated further by physical means

Question 4

All samples of a specific substance have the same chemical composition.

Answer 4

True

Question 5

Substances may either be elements or compounds.

Answer 5

True

Question 6

A mixture is not considered to be a pure substance.

Answer 6

True

Question 7

A pure substance can be separated into components by physical methods.

Answer 7

False

Question 8

Aspirin is a mixture of different compounds.

Answer 8

True

Question 9

Salt is a pure compound.

Answer 9

Yes

Question 10

Which of the following is NOT a pure substance?

Answer 10

Aspirin