The Structure of the Atom 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.

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 .

Which statement best describes the relationship between the ingredients?

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

To separate a mixture of iron filings and salt, 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.

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