| Term | Definition |
| 1 atm | 760 mm HG (760 torr) |
| Standard Temperature and Pressure (STP) | 273.15K (0 degrees Celsius) and 1 atm. Used for gas law calculations. |
| Boyle's Law | P1V1=P2V2 |
| Charles' Law | V1/T1=V2/T2 |
| Avogadro's Principle | n1/V1=n2/V2 |
| Ideal Gas Law | PV=nRT |
| Gas Constant | Under STP conditions, 1 mole of gas was shown to have a volume of 22.4L and this gives an R value of 8.21x10^(-2)L(atm)/mol(K). R is known as the... |
| Density | ? =m/V=P(M)/RT (M is molar mass) |
| P1V1/T1 | ?=P2V2/T2 |
| Dalton's Law of Partial Pressures | P(tot)= Pa + Pb + Pc.... |