3. Matter and Energy

In the classification of matter, which statement best defines a compound?

In the classification of matter, how should black coffee (filtered, unsweetened) be classified?

In the classification of matter, an atom combines with other atoms to form a molecule; by analogy, a letter combines with other letters to form a(n) _____.

Which element must be present in an organic compound?

In the classification of matter, which element must be present in an organic compound?

In introductory chemistry, organic compounds are defined as compounds that contain which element?

In the context of classifying matter, pencil “lead” is primarily graphite, which is carbon. How should pencil lead be classified?

In the classification of matter, propane (C3H8) is best classified as which of the following?

In the classification of matter, all organic molecules contain which element?

In the classification of matter, which element is present in all organic molecules?

In the context of classifying matter, which element is the primary component of most fossil fuels (coal, petroleum, and natural gas)?

In the classification of matter, baking soda (sodium bicarbonate, $N_{1}aH{C}_1{O}_3$) is best classified as which of the following?

In the classification of matter, how is a compound different from an element?

Which of the following substances is an element?

A compound differs from a mixture because it: