October 19, 2009 [JOANNE]

THE MOLE:
1 mole = 6.02 x10²³ -- Avogardo's Number

HYDROGEN BOMB EQUATION:
2H₂ + O₂ = 2H₂O

(2H₂ molecules 1 O₂molecule 2 molecules of H₂O)

12,02 x 10²³ of H₂ molecules + 6.02 x 10²³ molecules of O₂ = 12.04 x 10²³ molecules of water
-> 2 mole of H₂, 1 mol of O₂, 2 mol of water

HOW GASES COMBINE
- John Dalton
- Look at masses of gases

(Ex.) 11.1g of H₂ reacts with 88.9g of O₂
(Ex.) 46.7g of N₂ reacts with 53.3g of O₂
(Ex.) 42.9g of C reacts with 57.1g of O₂

JOSEPH GAY-LUSSAC:
- combine gases based on volume
Ex.) 1L of H₂ reacts with 1L of Cl₂ = 2L of HCl
Ex.) 1L of N₂ reacts with 3L of H₂ = 2L NH₃
Ex.) 2L of CO reacts with 1L of O₂ = 2L CO₂
**gases combine in simple whole # ratios


AVAGARDO'S NUMBER
- Equal volumes of any gas at a constant temperature and pressure contain equal number of molecules