When using the ideal gas law, what do you put in for n?
Unless it gives itto you, you put1 mole
In boyle's law, V ∝ 1/p.
In charles' law, V ∝ T
In avogadro's law, V ∝ n
If we add the law equations thar are proportional to V, what do we get?
V ∝ nT/p
When do you use PTV = PTV?
For problems with changing conditions
What do you use PV = nRT?
For problems with one set of conditions, solving for either grams or moles, calculating either molecular weight (molar mass) or density, and stoichiometry at non-STP conditions
What are the top 3 formulas
PV=nRTD=m/Vmm (MOLAR MASS) =g/mole
If the temp doubles, what happens to the density?
Increases
If the pressure quadruples, what happens to the density?
It quadruples
How do you find the density of a gas at STP?
You can just cancel out the units and get g/L, and use STP values
How do you find the density of a gas at non-STP?
You have to use PV = nRT to find volume because it's not at STP
How do you find the molar mass of a gas at non-STP?
You have to use PV = nRT to find the number of moles
How do you find the molar mass of a gas at STP?
Cancel terms, or usePV = nRTwith1 L (because it gives you density)
How do you do stoich for gases when they're not at STP?
Forcertain values, youwillwrite NOT ___(STP value) and then they will cancel