Chem 1a Final

Heisenberg Uncertainty Principle

The position and momentum of a particle can be measured precisely, but not at the same time.

Van Der Waals Equation for real gasses

Attractive forces between the molecules serve to reduce the pressure exerted on the wall of the container.

Observed Pressure is less than Ideal Pressure

Boltzman Distribution

The Energy of molecules in a mole of gas is distributed over a wide range at constant temperature.

Law of conservation of mass

Weight of Reactions = Weight of Products

Law of definite proportions (constant composition)

A given compound always contains its constituent elements in the same mass percent.

Law of multiple proportions

If two elements form more than one compound, the masses of one element that combine with a fixed mass of the other are in small whole-number ratios.

Molecule vs. Ion

Molecule has no overall charge (Equal cations and anions)

Ions are charged positive to form cations or negative to form anions

Compound vs. Molecule

Compound: two or more different elements bonded together

Molecule: two or more or more atoms bonded together (elements or compounds)

Anion vs. Cation

Anion: negatively charged ion
Cation: Positively charged ion