The Structure of the Atom

Question 1

A number of substances and their chemical formulas are listed below. Check the ones that are compounds.

Revolt · Accepted Answer

B: carbon monoxide (CO); C: glucose (C6H12O6)

Question 2

Coffee is a solution of organic substances in water.

Revolt · Accepted Answer

A: mixture

Question 3

Brass is a combination of a number of elements. Its exact composition can vary.

Revolt · Accepted Answer

A: mixture

Question 4

Caffeine contains hydrogen, carbon, nitrogen, and oxygen atoms in a fixed ratio.

Revolt · Accepted Answer

B: compound

Question 5

Sports drinks contain sugar, salt, and flavorings dissolved in water. They can be made more or less sweet by adding different amounts of sugar.

Revolt · Accepted Answer

A: mixture

Question 6

Soda is a mixture. The ingredients list for a can of soda is given below.The ingredients of the soda are best described as .

Revolt · Accepted Answer

B: compounds

Question 7

To separate a mixture of hard candies and marbles, the most efficient method would be .

Revolt · Accepted Answer

B: sorting the mixture by hand

Question 8

To separate a mixture of large gravel and sand, the most efficient method would be .

Revolt · Accepted Answer

C: passing the mixture through a sieve

Question 9

Which statement best describes the relationship between the ingredients?

Revolt · Accepted Answer

C: They are not chemically bonded to each other.

Question 10

To separate a mixture of iron filings and salt, the most efficient method would be .

Revolt · Accepted Answer

A: passing a magnet through the mixture

The Structure of the Atom Answers