What is a compound? What is meant by the law of constant composition for compounds and why is this law so important to our study of chemistry?

How is the concept of energy defined? What are some common units of energy, and how are these units defined? What is meant by the specific heat capacity of a material? How is specific heat capacity used to measure energy changes in processes?

What is a mixture? What is a solution? How do mixtures differ from pure substances? What are some of the techniques by which mixtures can be resolved into their components?

What is an element and what is a compound? Give examples of each. What does it mean to say that a compound has a constant composition? Would samples of a particular compound here and in another part of the world have the same composition and properties?

What is the difference between a chemical property and a physical property? Give examples of each. What is the difference between a chemical change and a physical change? Give examples of each.

What is matter? What is matter composed of? What are some of the different types of matter? How do these types of matter differ and how are they the same?

What is matter? What is matter composed of? What are some of the different types of matter? How do these types of matter differ and how are they the same?

Most people think of science as being a specific, exact discipline, with a "correct" answer for every problem. Yet you were introduced to the concept of uncertainty in scientific measurements. What is meant by "uncertainty"? How does uncertainty creep into measurements? How is uncertainty indicated in scientific measurements? Can uncertainty ever be completely eliminated in experiments? Explain.

Many college students would not choose to take a chemistry course if it were not required for their major. Do you have a better appreciation of why chemistry is a required course for your own particular major or career choice? Discuss.

You have learned the basic way in which scientists analyze problems, propose models to explain the systems under consideration, and then experiment to test their models. Suppose you have a sample of a liquid material. You are not sure whether the liquid is a pure compound (for example, water or alcohol) or a solution. How could you apply the scientific method to study the liquid and to determine which type of material the liquid is?

A simple $\rule{1.25 cm}{}$ ion has the same name as its parent element.

Write the formula for each of the following substances.

l. lithium sulfite

Write the formula for each of the following substances.

k. barium acetate

Write the formula for each of the following substances.

j. nitric acid