Unit 4
This is the name for the force that holds two atoms together in a molecule.
What is a bond?
This is the number before a molecule in a balanced equation
What is the coefficient?
This principle describes how systems at equilibrium shift when stressed
What is LeChatelier's Principle?
This symbol indicates a reaction is reversible
What is a double arrow?
This is the value of Avogadro's number
What is 6.02*1023?
These are the electrons in the outermost shell of an atom.
What are valence Electrons
This is the molar mass of CH4. INCLUDE UNITS!
What is 16 g/mol?
This theory describes the idea that molecules need to bump into each other for a chemical reaction to occur
What is collision theory?
This is the peak of a reaction diagram. It's the amount of energy molecules need for a reaction to occur.
What is activation energy?
This is the compound that runs out first in a chemical reaction
What is a limiting reactant?
This is the term for a reaction where one reactant turns into two or more products.
What is decomposition?
This is the key unit in chemistry calculations, representing an incredibly large number of particles
What is a mole?
At equilibrium, this is true about the concentrations of the compounds
What is they are constant?
This is the term for a reaction that releases energy from the molecules into the environment
What is exothermic?
This is the equation for finding concentrations and volumes when diluting solutions
What is M1*V1=M2*V2?
This rule references how many electrons most elements have when forming ions or covalent compounds.
What is the octet rule?
This is the formula for the compound magnesium iodide.
What is MgI2?
When writing equilibrium expressions, the rule is [blank] over [blank]
What is Products over Reactants?
A reaction is expected to produce 34 grams of product. Only 14 grams are collected. This is the percent yield.
What is 41%
It takes this many half-lives for a sample to decay to 6.25% of its original mass.
What is 4?
There are this many moles in 46 grams of Bismuth
What is 0.22 mol?
Balance this chemical equation
__Al+__Fe2O3→__Al2O3+__Fe
2Al+Fe2O3→Al2O3+2Fe
Adding more of a reactant causes this shift in the equilibrium
What is towards products?
If oxygen is a reactant, and the products include carbon dioxide and water, it must be this kind of reaction.
What is combustion?
A bond between two atoms that has an electronegativity difference of 1.3 is this type of bond.
What is polar covalent?