1. Standard Conditions for Gases
Standard temperature and pressure (STP) 0° C, 1.0 atm and Vm= 22.4 mol L¯¹
Standard labratory conditions (SLC) 25 ° C, 1.0atm and Vm= 24.5 mol L¯¹
We use the appropriate temperature and pressure to calculate the volume of gas under these conditions.
And we use the molar volume to determine the amount of moles we have for a gas at those conditions.

2. Molar Volume
Vm is the volume occupied by 1 mole of any gas at a given set temperature and pressure.
There is a difference between the units for Molar volume and Volume. Molar volume uses mol L¯¹ and volume is measured in litres.
Formula n=
So if we know the volume of a gas or gas mixture at STP or SLC we can find how many moles of it is present.

3. The General gas Equation
This equation shows the relationship between the volume of gas, pressure its under, temperature conditions and amount of gas.
PV=nRT
P= pressure in kPa
V= volume in L
n = total moles
R= universal gas constant 8.31 JK¯¹ mol ¯¹
T = temperature in K
Generally use this when it is not at STP or SLC

4. Gas Stoichiometry
In order to calculate gas Stoichiometry we need to draw on all the formulas that we have learnt and been shown up until this point.
Can you list all the formulas?