Molar Volume of a Gas a STP

As we all know, gas changes in volume. Gas expands and contracts from different changes in temperature and pressure. STP stands for Standard Temperature and Pressure and it is to compare the volume of the a gas. STP equals to 1 atmosphere with a temperature of zero degrees celcius ( also know as 273.15K ).

Mole Map

The mole map above shows that 1 mole occupies 22.4L. In this case, we can make the new conversion of a gas, being:

22.4L of Gas                1 mol of Gas

1 mol of gas      (or)    22.4L of gas

Example:
Let's try to calculate the volume of 3.4g of Carbon Dioxide at STP...
First you would want to find the molar mass of the compound:
(1 x 12) + (2 x 16)= 48g/mol

Next, find the moles of carbon dioxide:
3.4g x 1 mol = 0.07 moles
             48g

Then you find the molar volume:
 22.4L  x 0.07 moles = 1.6g
1 mole

which means, approximetly 1.6g of carbon dioxide is volume occupied at STP.