Part 1 Chemistry Chapter 1

Service Description

Grandma will use this description for the impaired to get the first chapter. There are pictures of the Chapter to use also.(Those impaired cannot see the pictures so Grandma will explain each Chapter. Chapter 1 is also Part I: Introduction to Chemistry. The chapter is also called Introduction to Chemistry. Its Objectives includes 5 areas "-Identify types of matter as elements, compounds, or mixtures -Identify chemical and physical properties and changes -Explain how energy is involved in chemical and physical changes -Identify and use the SI system of measurement -Do mathematical calculations using scientific notation, dimensional analysis, and significant figures" This first part of the chapter is all about Matter. (The quotes' ' hold the word being defined.) It first gives the definition of 'Matter' "as anything that occupies space and has mass. I am sure this is in the Glossary. 'Mass' is the quantity of matter that a substance possesses and, depending on the gravitational force acting on it, has a unit of 'weight' assigned to it. Although the weight can then vary, the mass of the body is a constant and can be measured by its resistance to a change of position or motion. This property of mass to resist a change of position or motion is called 'inertia.' Since matter does occupy space, we can compare the masses of various substances that occupy a particular unit volume. This relationship of mass to a unit volume is called the 'density' of the substance. It can be shown in a mathematical formula as D=m/V" or Density=Mass/Volume. "A common unit of mass (m) in chemistry is the gram(g), and of volume(V) is the cubic centimeter" (cm to the 3rd) or milliliter(mL). The book uses an example of 1g of a metal as gold and 1g of styrofoam. It says, "Both have the same mass...but the volume occupied by the styrofoam is much larger. Therefore, the density of the metal will be much larger than that of the styrofoam. When dealing with gases in chemistry, the standard units for the density of gases are grams per liter at a standard temperature and pressure. The aspect of the density of gases is dealt with in Chapter 6." We will move to another lesson to continue with the Introduction of Chemistry, Chapter 1.