Molar Volume of a Gas at STP

You are probably wondering what STP stands for and how it affects gas, well these are some notes: 
-Gases expand and contract with changes in temperature and pressure
-STP = Standard Temperature and Pressure
-STP = 1 atmosphere of pressure and a temperature of 0°C or 273.15 K
-At STP 1 mole of gas occupies 22.4L
-Thus we can create the conversion factor :   22.4L
                                                                   1 mole

Here is an example:  What is the volume of BrO3 at STP? 
First step: BrO3's molar mass is 127.9 g and BrO's molar mass is 95.9 g
Then convert it to moles: 127.9 g x 1 mole = 1.33 moles
                                                    95.9 g
Next we use the answer and use it with the formula: 1.33 moles x 22.4 L = 29.8 L of BrO3.
                                                                                                  moles


Here is a video demostration STP and its equation: