Mass is usually defined as a measure of the amount of matter in an object. Which statement is not true about matter?

There are seven diatomic molecules. Name four of them. Give their molecular formula as found in nature.

Balance the following equation. If the coefficient is one, put 1 in the blank.   C2H5SH + O2 –> CO2 + H2O + SO2

What component of the atom gives it its identity?

Prefixes are used to described base units in terms that relate to the subject being studied. For example we measure long distances in kilometers rather than meter or millimeters. It is important to understand what these prefixes mean. So, how many micrograms are in a megagram? Write your answer using scientific notation.

Calculate the range for this sample (note, data are the same for questions 4 and 5) 100, 4, 7, 96, 80, 3, 1, 10, 2

Calculate the median of the following data (note, data are the same for questions 1, 2, and 3)  18, 10, 15, 13, 17, 15, 12 ,15, 18, 16, 11

These microorganisms normally do not causes disease in people, however, when someone’s body immune defenses are compromised or weakened, these organisms can cause disease.  These organisms are known as ….. 

Match the proper definitions with the proper terms.

The toxin that is already a part and attached to the outer part of Gram negative bacteria and are released when the bacteria cells dies