This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: CHEM 1A Week 2: Friday
December 10, 2008 Law of Multiple Proportions
If two elements form multiple compounds, the ratios of the masses of the second element combining with a xed mass of the rst element will be in ratios of small whole numbers.
Naming conventions Common prexes/suxes
-ite compound w/least oxygen -ate the compound w/most oxygen hypo- less than per- more than
Generally never use mono The Mole
mole the amount of substance that is equal to the same number of entities
contained in a carbon-12 Example problems
How many moles are in 1.25 g Si? (1.25 g Si) 1 mol 28.07g = 4.45 × 10−2 mol 1 Review queue
Memorize Table 2.4 memorize systematic name Review naming conventions, e.g. for Na2 SO4 , Na2 SO3 , etc. 2 ...
View Full Document
- Fall '07
- Van Koppen
- Chemical element, International System of Units, Molecule, Chemical substance, Avogadro constant, compound w/least oxygen