Empirical Formula of Magnesium Oxide
Take a look at this video.
We will run this experiment in our Chemistry Class soon!! ^^
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Empirical Formula
Empirical Formula
- simplest ratio of atoms of each elements that present in the compound.
Result:
Molecular Formula:
-the actual number of atoms of each element that are present in one molecule of the compound.
Atom
How to remember?? ^.^
Daddy Takes Racket Back Chicago
(Dalton --> Thomson --> Rutherford -->Bohr --> Chadwick)
Interconversion of the 3 states of matter
Overview~
Exothermic = Exit (Release heat)
- liquid --> solid (Freezing)
- gas --> liquid (Condensation)
- gas --> solid (Sublimation)
Endothermic = Enter (Absorb heat)
- solid --> liquid (melting)
- liquid --> gas ( boiling )
- solid --> gas ( sublimation)
Quiz Chapter 3
Practice Make Perfect~~!
Mole and number of particles conversion
http://www.softschools.com/quizzes/chemistry/counting_particles_and_avogadros_number/quiz1119.html
Molar Mass:
http://www.softschools.com/quizzes/chemistry/molar_mass/quiz1120.html
Mass and mole conversions quiz:
a. mass ----> mole
http://www.softschools.com/quizzes/chemistry/mass_mole_conversions/quiz1122.html
b. mole ----> mass
http://www.softschools.com/quizzes/chemistry/mole_mass_conversions/quiz1121.html
Gram/Mole/Volume Conversions：
http://www.sciencegeek.net/Chemistry/taters/Unit4GramMoleVolume.htm
Diffusion of HCl and ammonia
Let us look at the real experiment:
What is happening ...
HCl(RMM: 1+35.5 =36.5) is heavier than NH3(RMM: 14 + 3 =17)
thus, NH3 diffuse faster than HCl
Diffusion
Diffusion:
- Process by which particles in matters move from a place of high concentration to a place of low concentration until both places have the same concentration.
Diffusion in different state
Solid
Liquid
Gas
Characteristics of Matter
Summary of mole
Overall:
Remarks:
L = dm3
at RTP: 24 dm3
Mixed Mole Conversions
Given unit ----> Moles ---->Desired unit
eg:
mass(g) ---> mole ---> number of particles
number of particles ---> mole ---> mass(g)
mass(g) ---> mole ---> volume(dm3)
volume(dm3)---> mole ---> mass(g)
volume---> mole ---> number of particles
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