Homework 1. How many molecules are in 6 moles of CO2?

2. How many moles are in 1.5 x 1024 Carbon atoms?

3. How many grams are in 4 moles of N2?

4. How many moles are in 4.04 g of H2?

Homework5. How many grams are in 5.02 x 1023 CH2O molecules?

6. How many molecules are present in 453.6 g of NH4NO3 (ammonium nitrate)?

THE VOLUME OF A MOLE OF GAS

22.4L

When talking about liquids and solids, the amount of space that one mole of something occupies can change

When talking about gases, the amount of space that one mole occupies will always be the same. (Avogadro’s Hypothesis)

•The volume that the gas occupies will change greatly depending on the heat and pressure

•Need to keep heat and pressure constant for Avogadro’s hypothesis to work•STP: Standard Temperature and Pressure = 0oC and 1 atmosphere (atm)

•At STP, any gas will occupy 22.4L

Extending the Mole Bridge

22.4 will always go in front of “L” if the gas is at STP

Practice!1. How many moles are in 11.2L of SO2 at STP?

2. How many Liters would 4 moles of N2 take up if it were at STP?

3. How many molecules are in 134.4L of CO?

4. How many grams would 2352L of O2 weigh?

Mole Conversions 2 (Name:______ Per.__)1. How many grams would 0.453 mole of NH3 weigh?

2. How many grams would 4.21 x 1024 molecules of CO2 weigh?

3. How many Liters would the CO2 gas from the above question occupy at STP?

4. How many Liters would 25 moles of H2 gas take up at STP?