Reactions
An example of a diatomic element
halogens (Cl, F, Br, I), oxygen, nitrogen, hydrogen
The type of reaction that involves reacting with oxygen
combustion
6.022 x 1023
If you need to cancel out units, the conversion factor should have those units on the _________
bottom
An example of a particle in chemistry
molecule, atom, formula unit, ion
The reason you can't change subscripts when balancing a chemical equation
It would change the chemical formula, representing a different compound altogether
The reaction type(s) for this equation:
Al2O3 + 3H2O → 2Al(OH)3
synthesis
Definition of molar mass
the mass of one mole of a substance
definition of Stoichiometry
the calculation of the amount of one (or more) element(s) based on the amount of a different element in a balanced chemical equation.
The approximate molar mass of water
18 g/mol
Given the balanced equation:
2NaCl -> 2Na + Cl2
The number of moles Cl2 produced if 4.8 moles of NaCl decompose?
2.4
The reaction type(s) for this equation:
2CH2O + O2 → 2CH2O2
synthesis, combustion
The approximate number of particles in 3 moles
18 x 1023
The method to convert grams into moles
divide by molar mass
The way you know if a chemical equation is balanced
The numbers of each type of atom are the same on both sides
The coefficients needed to balance this equation:
___Cu2O + ___C -> ___Cu + ___CO22,1,4,1
The reaction type(s) for this reaction:
2H2O → 2H2 + O2
decomposition
Method to convert moles into particles
multiply by avogadro's number
The first step in a Stoichiometry problem
Make sure the reaction is balanced
The reason chemists use moles
they make huge numbers into smaller ones, making calculations/understanding of reactions easier
Definition of "aqueous"
substance dissolved in water
This type of reaction can only have 1 reactant
decomposition
Definition of a formula unit
Chemical formula for an ionic compound
If you need to convert between grams and particles, first you must convert to _______
moles
Definition of a catalyst
something added to a reaction to speed it up