Aim How to convert from moles to volume

Aim: How to convert from moles to volume and vice versa

Avogardo’s Hypothesis Avogadro's hypothesis says that the same volume of gas contains the same number of particles. It does not matter what gas you have, they all contain the same number of particles provided that they are at the same temperature and pressure.

STP Volume of gas and temperature are usually measured at STP. Standard temperature and pressure (STP) means temperature of 0 o. C and a pressure of 101. 3 k. Pa, or 1 atmosphere (atm). At STP, 1 mole or 6. 02 x 1023 representative particles of any gas occupies a volume of 22. 4 L.

Two conversion factors Moles to Volume to Moles

Calculating from moles of gas to volume of gas Conversion Factor

Calculating the volume of a gas at STP Determine at STP. 1. Identify the volume, in liters, of 0. 60 mol SO 2 gas known and unknown. Known 1 mol = 22. 4 L 0. 60 mol SO 2 Unknown volume of 0. 60 mol SO 2

What is the volume of these gases at STP? a. 3. 20 x 10 -3 mol CO 2 x 22. 4 L / 1 mol = 0. 0717 L CO 2 b. 3. 70 mol N 2 x 22. 4 L / 1 mol = 82. 9 L N 2

Converting from volume of gas to moles of gas Conversion Factor

Calculating number of moles of a gas at STP How many moles of helium at STP will fit into a 39. 6 L container? 1. Identify known and unknown. Known Unknown 1 mol = 22. 4 L # of moles 39. 6 L

How many moles of argon atoms are present in 11. 2 L of argon gas at STP? 11. 2 x 1 mol / 22. 4 L = 0. 500 moles

Calculating Molar Mass From Density Molar volume Molar Mass density

Calculating molar mass of gas at STP The desnity of a gaseous compound containing carbon ad oxygen is found to be 1. 964 g/L at STP. What is the molar mass of this compound. 1. List known and unknown. Known Density = 1. 964 g/L 1 mol = 22. 4 L Unkown molar mass ?

What is the density of krypton gas at STP