Unit Test Answers

Bronze is a mixture of copper and tin. It is made by combining the two elements in a specific proportion and allowing the atoms to mix evenly. Although the ratio of copper to tin can vary from one sample of bronze to another, the ratio is the same throughout any given sample.Bronze is

Soda water is a mixture of carbon dioxide gas and water. Typically, more bubbles of carbon dioxide gas form near the surface and sides of a glass of soda water than in the middle. Soda water is

Plant pigments are

Other chemicals are

Stained glass consists of colored dyes mixed with silicon dioxide molecules. Variations in the color of the glass occur because the dyes often do not mix completely with the silicon dioxide. Stained glass is

Water is a

Benzene is a

Identify the solutions (homogeneous mixtures) in the list below. Check all that apply.

A small amount of red paint is mixed with water. When a laser pointer shines through the mixture, the beam is clearly visible in the mixture. This mixture is a .

Which techniques would be best for separating the solute from the solvent in a solution? Check all that apply.

Coffee is a mixture of water, caffeine, and a number of plant chemicals. Different cups of coffee may have different amounts of these chemicals, but the ratio of the chemicals is the same throughout any given cup of coffee. Coffee is

Caffeine is a

Toluene is a

A chef makes a marinade by mixing red pepper flakes, dried onion flakes, and ground ginger with soy sauce. He sets the marinade on the counter for a few minutes. When he returns, he must stir the marinade because the spices have settled to the bottom of the container.This mixture is a .

Which techniques would be best for separating a colloid mixture but would not work well with solutions? Check all that apply.

Octylphenol ethoxylate is a