The Historical Development of Atomic Theory Answers

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

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

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

Describe the best method for separating a mixture of sand, salt, and steel shavings by placing the steps below in the correct order. Heat the mixture to evaporate the water.

Pour the mixture through a filter to separate the sand.

Pass a magnet over the mixture to remove the steel.

Add water to the sand/salt mixture and stir to dissolve the salt.

Coffee is a solution of organic substances in water.

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

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

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

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

Which statement best describes the relationship between the ingredients?

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