A white solid with a melting point of 730 °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.

Hydrogen peroxide, often used in solutions to cleanse cuts and scrapes, breaks down to yield water and oxygen: Hydrogen peroxide, H₂O₂(aq) → Hydrogen, H₂(g) + Oxygen, O₂(g)

b. Which of the substances are chemical compounds, and which are elements?

Classify each of the following as an element, a compound, or a mixture:

b. a salad dressing of oil and vinegar

Classify each of the following mixtures as homogeneous or heterogeneous:

c. vegetable oil

Classify each of the following mixtures as homogeneous or heterogeneous:

b. herbal tea

Daniel suggests that Charle include one of the following mixtures in his diet. Classify each of the following as homogeneous or heterogeneous: b. tea

Which of the following statements is true?

Choose the homogeneous mixture from the list below.

Choose the homogeneous mixture from the list below.