Chemistry:
Taught by Susan Banks. We will be experimenting with chemicals and doing labs. We study the periodic table and learn how to apply the information on it to chemistry. We will learn about significant figures, calculating different formulas, and how chemistry applies to everyday life.
Taught by Susan Banks. We will be experimenting with chemicals and doing labs. We study the periodic table and learn how to apply the information on it to chemistry. We will learn about significant figures, calculating different formulas, and how chemistry applies to everyday life.
During the first semester of Chemistry we did several labs and learned a lot about how to calculate masses, reactions, and products of those labs.
An example of the calculations that we learned is the empirical and molecular formulas and mass percentages. The mass percentage of a molecular compound can be found by looking at the mass of the element compared to the mass of the compound. For example, water, H2O. The mass of Hydrogen is 1.01g. Since there are two of them, we must multiply 1.01 by 2. This gives us 2.02. Then we add that to the mass of Oxygen, 16.00g. This gives us a total mass of the compound H2O as 18.02g. Now we look at the individual elements.
H: 2.02/18.02 x 100 = 11.2%
O: 16.00/18.02 x 100 = 88.7%
These are the mass percents of each element in the chemical compound H2O.
An example of the calculations that we learned is the empirical and molecular formulas and mass percentages. The mass percentage of a molecular compound can be found by looking at the mass of the element compared to the mass of the compound. For example, water, H2O. The mass of Hydrogen is 1.01g. Since there are two of them, we must multiply 1.01 by 2. This gives us 2.02. Then we add that to the mass of Oxygen, 16.00g. This gives us a total mass of the compound H2O as 18.02g. Now we look at the individual elements.
H: 2.02/18.02 x 100 = 11.2%
O: 16.00/18.02 x 100 = 88.7%
These are the mass percents of each element in the chemical compound H2O.