Gases:
Frequently asked questions

Avogadro's Law and gas densities

• What volume of gas is produced by vaporizing a given volume of dry ice?
• How do I estimate gas densities at STP?
• How do I predict whether a gas is heavier or lighter than air?
• How many molecules are present in a given volume of gas at STP?
• Why is wet air less dense than dry air at the same temperature?

Empirical gas laws

• What are some examples of the gas laws in action in everyday life?
• How does the volume of gas in a pop bottle change on opening the bottle?
• What volume of gas is needed to prepare a 20% NH₃ solution?

Mixtures of gases

• What is the final pressure when two gases at different pressure are mixed?

Molecular weights of gases

• How can I find the molecular formula of a gas from experimental data?

Reaction stoichiometry

• How much gas is produced when baking soda react with excess vinegar?
• What volume of gaseous reactant produces a given amount of product?

Real gases

• Under what conditions do real gases behave ideally?

Copyright © 1997-2005 by Fred Senese
Comments & questions to fsenese@frostburg.edu
Last Revised 07/31/07.URL: http://antoine.frostburg.edu/chem/senese/101/gases/faq.shtml