CHEM 1001 Chapter : Chapter 5 Chemistry
Document Summary
Represent chemical sentences in the language of chemistry. S solid | l liquid| g- gas | aq aqueous solution. Gay lussac"s law of combined volume states: When all measurements are made at the same temperature and pressure, the volumes of gaseous reactants and products are in a small whole-number ratios. When measured at the same temperature and pressure, volumes of all gases contain the same number of molecules. Avogadro"s number is defined as the number of atoms in a 12-g sample of carbon-12 and is 6. 02 x 1023. A mole (mol) is defined as the amount of a substance that contains 6. 02 x 1023 particles. Formula mass is the sum of the atomic masses for all atoms in a formula. If the formula represents a molecule, often the term molecular mass is used. The number used for formula masses are the mass numbers not atomic numbers.
