Complete the table. Substance pure or mixture type water pure compound coffee ___ _ ice _ _ carbon _ ___

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Identify the nature of each substance: Determine if each substance is a pure substance or a mixture.

Classify pure substances: Pure substances can be elements or compounds. Elements consist of only one type of atom, while compounds consist of two or more types of atoms chemically bonded together.

Classify mixtures: Mixtures can be homogeneous or heterogeneous. Homogeneous mixtures have a uniform composition throughout, while heterogeneous mixtures have a non-uniform composition.

Apply classification to each substance: For example, water is a pure compound because it consists of H2O molecules. Ice is also a pure compound because it is the solid form of water.

Determine the type for coffee and carbon: Coffee is a mixture, typically a homogeneous mixture, because it consists of various compounds dissolved in water. Carbon, in its pure form, is an element because it consists of only carbon atoms.

Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Pure Substances vs. Mixtures

A pure substance consists of a single type of particle and has a uniform composition, such as elements and compounds. In contrast, a mixture contains two or more different substances that retain their individual properties and can be separated by physical means. Understanding this distinction is crucial for classifying substances correctly.

Types of Mixtures

Mixtures can be classified as homogeneous or heterogeneous. Homogeneous mixtures have a uniform composition throughout, such as solutions, while heterogeneous mixtures consist of visibly different substances or phases. Recognizing these types helps in identifying the nature of mixtures like coffee, which is typically a homogeneous mixture.

States of Matter

Substances can exist in different states of matter: solid, liquid, and gas. The state of a substance is determined by the arrangement and energy of its particles. For example, ice is the solid state of water, while liquid water is its liquid state. This concept is essential for understanding the physical properties of substances in the table.

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Textbook Question

Convert each temperature. a. 212 °F to °C (temperature of boiling water at sea level) b. 22 °C to K (approximate room temperature) c. 0.00 K to °F (coldest temperature possible, also known as absolute zero) d. 2.735 K to °C (average temperature of the universe as measured from background black body radiation)

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Textbook Question

Classify each statement as an observation, a law, or a theory.

a. All matter is made of tiny, indestructible particles called atoms.

b. When iron rusts in a closed container, the mass of the container and its contents does not change.

c. In chemical reactions, matter is neither created nor destroyed.

d. When a match burns, heat is released