Stoichiometry
What does a coefficient mean in stoichiometry?
The coefficient can mean the amount of moles in a balanced equation.
What are chemical bonds?
Chemical Bonds are forces that hold groups of atoms together and make them function as a unit.
Name 3 properties of metals
Shiny, reactive, malleable, good conductor, cation
What is a chemical reaction?
A process involving one or more substances changing into a new substance.
Individual atoms cannot reliably be measured in substances. What constant is used to represent the number of atoms in a specific mass of a compound?
Avagadro's Number:
6.022x1023 particles
How many moles of carbon dioxide would be produced in the following combustion reaction if it worked with 100% efficiency?
____CH4 + ____O2 -->
1 mol CO2
What are the two elemental exceptions to the octet rule?
Hydrogen and Helium
Which is the most stable group ?
Noble Gases
If the product of a chemical reaction has (s) beside it, what does that mean about that product?
Identifies the product as a solid state, or precipitate
How many moles of Beryllium chloride are in 159.84 grams of Beryllium chloride?
2 mol BeCl2
How many steps are there in mass to mass stoichiometry?
3 steps.
With which molecules do you have add Greek prefixes?
Covalent molecules
What is the most reactive non-metal on the periodic table?
Fluorine
Zn + H2S --> H2 + ZnS
What type of reaction is this? And what are the products' chemical names?
Single Displacement,
Hydrogen Gas (Diatomic hydrogen)
Zinc II Sulfide
What is molar mass ?
The mass in grams of one mole of any pure substance.
What number do you start your stoichometric conversions with?
The number that you are given!
The purpose of Lewis Dot Diagrams is to easily show the number of __________ .
Valence electrons
What is the most reactive metal on the periodic table?
Francium
Water is synthesized from hydrogen gas and oxygen gas. Write the balanced synthesis reaction.
2H2 + O2 --> 2H2O
How many moles of Iron II are in the following compound? Fe2Cl6
Zero
What does the term “stochio“ mean?
Greek for element
Give the name for the following chemical compound: Cl2Ar4
Impossible compound - Argon is a noble gas
What is the name of the following compound? CrO3
Chromium VI Oxide
What type of reaction is this:
2C2H7OH + 9O2 --> 6CO2 + 8H2O
CxHx + Oxygen --> Carbon Dioxide and Water
Sucrose is a disaccharide that is formed from the dehydration of a glucose and fructose molecule:
C6H12O6 + C6H12O6 --> C12H22O11 + H2O
Because of the dehydration, it is no longer in the same ratio as glucose or fructose (which are isomers: chemically identical with different structures).
Give the empirical formulas for glucose, fructose, and sucrose.
Glucose: CH2O (1:2:1)
Fructose: CH2O (1:2:1)
Sucrose: C12H22O11 *cannot be reduced