Throughout the entire course youll need to be able to convert units (cm to mm etc) in the
problems. The procedure is called dimensional analysis. You will use the same process when you
perform calculations with grams, atoms, mol
Quantities of Reactants and Products
Chemists want to make new compounds and modify existing compounds. To do this we need to
understand how chemical reactions take place.
4.3 page 125.
Many chemical reactions fall into a few general
Chemistry 114 Notes
Perhaps the most important work that chemists do is to make chemical compounds.
Sometimes scientists will search for complex molecules that occur in nature and test the
molecules to see if they have any other uses. On page 3
We saw 3 functional groups earlier in the course. These help determine the chemical and
physical properties of organic molecules. However, the shape of the molecule is also important.
It determines how much room there is for
Molarity, Dilutions, and Titrations
1. If a person places 10.0 g of NaCl in a 500.00-mL volumetric flask and fills it with
deionized water, what is the molarity of the resulting NaCl (aq) solution?
2. When the solution in the first ques
In nature very few elements are found as individual atoms.
Valence electrons in the atoms interact to hold atoms together in compounds.
Ionic Compounds metal and a nonmetal etc. Electrons are transferred to for
Gases can be made of atoms : He, Ne, Ar, Kr, Xe, Rn
Small molecules are often gases at room temperature and atmospheric pressure: CO2, O2, N2,
CH4 etc. More examples are seen in table 10.2 on page 433.
Atoms or molecules that make up a ga
Chapter 7 Notes
Electron Configurations and the Periodic Table
Mendeleev came up with the arrangement of the periodic table based on experimental
observations. That is, he knew their chemical and physical properties and grouped similar
elements in vertica
One of the main functions of chemists is to either make new molecules or modify existing
molecules to make them more useful. As we saw with the methamphetamine example, a slight
change to the molecule can profoundly change its
Chapter 10 Homework
1. There are several versions of the ideal gas law constant, R, that have different units.
When we say that , we need to make sure that the unit of pressure we use is
atmospheres. Convert the pressure 5.22 psi to atmospheres.
What do we learn in chemistry class?
Chemistry is defined as the study of matter and its transformation. But what does this mean?
Well, matter is anything that has mass and takes up space, so chemistry is really the study of (1
1. Arrange the following regions of the electromagnetic spectrum in order of increasing
energy: IR, UV, Visible, Radio, X-ray, Microwave
2. As the wavelength of electromagnetic radiation increases, the frequency of the