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) _____.

Classify each of the following as an element, a compound, or a mixture: (3.1) b. a salad dressing of oil and vinegar

Classify each of the following mixtures as homogeneous or heterogeneous: (3.1) c. vegetable oil

Classify each of the following mixtures as homogeneous or heterogeneous: (3.1) b. herbal tea

A white solid with a melting point of 730 degree C is melted. When electricity is passed through the resultant liquid, a brown gas and a molten metal are produced. Neither the metal nor the gas can be broken down into anything simpler by chemical means. Classify each—the white solid, the molten metal, and the brown gas—as a mixture, a compound, or an element.

Which of the following substances is a compound?

In introductory chemistry, organic compounds are typically defined by the presence of which element?

Within the human body, the most abundant chemical compound by mass is which of the following?

In the classification of matter, what term describes a pure substance made of only one kind of atom?