1. Molar Mass and Molar Volume
Chemistry
Molar Mass and Molar Volume

2. Molar Mass The mass of one mole of a substance
The same quantity as atomic mass or formula mass but has g/mol as its units.
Can be used as a conversion factor

3. Sample How many moles are 40.0 g of Magnesium? ? mol Mg = 40.0 g Mg

4. Try These How many moles of Iron are 26.3 g of Iron?
How many grams of water are 1.6 mol of water?
What is the mass of 1.5 x 1024 molecules of Carbon Dioxide?
0.471 mol Fe
29 g H2O
110 g CO2

5. Standard Molar Volume 22.4 L of gas @ STP = 1 mol of gas
The standard molar volume is the volume of one mole of gas at STP (Standard Temperature and Pressure: 1 atm and 0 degrees Celcius)
22.4 L of STP = 1 mol of gas
This can be used to convert from mass or moles of a gas to its volume at STP

6. Try These
An experiment takes mol of Nitrogen Monoxide gas. What volume would that be at STP?
How many moles of H2 are there in 49.7 liters of H2 at STP?
How many grams of oxygen gas at STP are there in 13.8 liters of oxygen?
1.30 L
2.22 mol
19.7 g