equilibrium
if a chemical is in equilibrium are there forces still acting on it? (yes/no)
yes
Why was the mole created?
so that scientists could measure the small number of particles they were working with
define chemical reaction
when one substance becomes another, bonds are broken and atoms are rearranged
what kind of reaction is a fire
exothermic
define le chatliers principle
if change is made to a system in equillibrium, it will counteract that change to minimize it
h20 -> 2O + H
2 moles
state 3 evidence for a chemical reaction seen in a firework
- noise
- smell
-color change
Do the products or reactants absorb energy in an endothermic process?
products
What are the three ways to change equilibrium
pressure, concentration, temperature
What is the molar mass of O2
32g
in a chemical reaction, the molecules on the left are called the _ and the molecules on the right are called ___
reactants, products
what kind of reaction always requires oxygen in the reactant side
combustion
if a reactant is removed from the equation, equilibrium will shift (left or right)
left
towards the side that was removed
molar mass allows you to convert between _________ and ___
grams and moles
what is the law of conservation of matter
matter cannot be created or destroyed
what are the five types of reactions
synthesis
decomposition
single replacement
double replacement
combustion
if concentration of a certain element is increased on the right side, the equilibrium will shift ___________
left
what is the molar mass of CO2
44g
When balancing a chemical reaction, you can change the large number in front of the molecule called the ___________
coefficient
how many grams are in 4 moles of o2
128 grams