What is the volume of 0.2 moles of neon gas at STP?

Standard Molar Volume is the volume occupied by one mole of any gas at STP. Remember that "STP" is Standard Temperature and Pressure. Standard temperature is 0 &176:C or 273 K. Standard pressure is 1 atmosphere or 760 mm Hg (also called "torr"). 1 mole of any gas at STP occupies 22.4 liters of volume.

Answer: 4.5 L

Explanation: Ideal gas at STP standard temperature and pressure: at STP

P = 1 atm

T = 1 °C convert to K (273 K)

Solution:

PV = nRT

Derive the equation to find V

V = nRT / P

Substitute the values

V = 0.2 moles x 0.082 L. atm / mol. K x 273 K / 1 atm

Cancel out the units of moles, atm and K so the remaining uni is in L.