Unit Test — Unit test Answers

What type of mixture scatters light and cannot be filtered easily?

Which pure substance can be classified as an element?

Which statement describes an intensive property of matter?

Which physical method can be used for obtaining a sample of salt from a small beaker of salt water?

A student is using a copper strip and a strong chlorine solution in her experiment. Which of these is a chemical property of one of her materials?

The picture below shows a mixture that was stirred 3 minutes ago.What should this mixture be classified as?

Which factor causes a decrease in the rate of dissolution?

The table below shows four samples of carbon dioxide gas and the temperature of the water that they were dissolved in.SampleTemperature of water (°C)1 782 733 554 63Which of the samples most likely had the lowest solubility?

What is the name of a solution whose concentration of solute is equal to the maximum concentration that is predicted from the solute's solubility?

Which statements are true of heterogeneous mixtures? 1) They settle out. 2) The proportions of solute to solvent may vary. 3) The solute is evenly distributed throughout. 4) They are composed of two solvents and two solutes.

Which substance is a mixture?

Air is made up of different gases, such as oxygen, nitrogen, and carbon dioxide. Which statement best describes these three components of air?

Which heterogeneous mixture contains large particles that can settle out or can be filtered?

Which process is a chemical change?

Which is true about the dissolving process in water?

A gravel can be broken down into different kinds of substances by physical processes. No chemical reactions are needed to separate different parts of gravel into pure substances. This is because gravel is a(n)

A student performs the following experiment.Step 1: She pours a colorless solution into a beaker that contains another colorless liquid. Yellow particles appear in the liquid.Step 2: She lets the yellow particles settle in the beaker and then separates the colorless liquid by decantation.What has most likely occurred in the beaker?

Milk is a heterogeneous mixture that contains different types of particles in different phases. Due to the sizes of the particles in milk and the way they are dispersed, the particles do not easily settle out. They also cannot easily be filtered out.Therefore, milk is best described as a

What are homogeneous mixtures of metals commonly called?

A 1-L soda bottle contains dissolved carbon dioxide gas. Which bottle would have the highest concentration of dissolved gas?