The idea that mass is neither created nor destroyed is known as ________________
Law of Conservation of Mass
Balance the following chemical equation:
Fe + Cl2 ---> FeCl3
2Fe + 3Cl2 ---> 2FeCl3
corrosiveness
What contains only one kind of atom?
an element
Draw a Bohr Diagram for Aluminum (atomic #13, atomic mass of 27 amu)
see drawing
How many elements are in one molecule of sulfuric acid (H2SO4)?
Which element has an ion charge of -3 and four energy levels?
Arsenic (As)
If you mix a clear liquid with an orange liquid and the result is a solid red precipitate and a yellow liquid, what are the reactants in this reaction?
clear liquid and orange liquid
What describes how hard an atom pulls on the another atom's electrons?
electronegativity
Balance the following equation:
C7H16 + O2 ---> CO2 + H2O
C7H16 + 11O2 ---> 7CO2 + 8H2O
Name an element that has the same properties as carbon.
silicon, germanium, tin, or lead
Using the data table provided, which property(ies) would be the most useful in identifying Low Density Polyethylene? Explain.
Density relative to water - because Low Density Polyethylene is the only substance that will float in water.
Flexibility - because Low Density Polyethylene is the only substance with good flexibility
What are polymers?
compounds made up of thousands of smaller, repeating monomers
Name 3 things that would indicate a chemical reaction took place.
change in color,formation of a precipitate, temperature change, production of gas
What are metalloids, and where can they be found on the periodic table?
Metalloids are elements whose properties are in between metals and nonmetals (semiconductors), and they can be found on the stepped line on the right side of the periodic table.
Using the know data, from which type of plastic would you choose to make an athletic water bottle? Explain.
Polyamide -- because it has a firm hardness, so it would be resistant to denting and scratching. Also, it resistant to both hot and cold temperatures, so it wouldn't be affected by extreme weather.