The Ideal-Gas Equation (Section)
(a) If the pressure exerted by ozone, O3, in the stratosphere is 3.0 × 10-3 atm and the temperature is 250 K, how many ozone molecules are in a liter? (b) Carbon dioxide makes up approximately 0.04% of Earth’s atmosphere. If you collect a 2.0-L sample from the atmosphere at sea level (1.00 atm) on a warm day (27 °C), how many CO2 molecules are in your sample?
CHEMISTRY CHEM 100002 CH 4 NOTES MOLECULES/COMPOUNDS/CHEMICAL REACTIONS 4.1 Molecules Cause the Behavior of Matter Water does what water molecules do, air does what air molecules do, and humans do what the molecules that compose us do. It is that simple, and it is always true. In all of science history, an exception to this rule has not yet been found. In this chapter, we begin our journey of understanding molecules and how they form the macroscopic substances that we experience every day. 4.2 Chemical Compounds and Formulas Chapter three told us that all matter is composed of atoms. Now we are going to focus on compounds (or mixt