CHEMISTRY ADVANCED STUDY
Source: https://www.khanacademy.org/
ELEMENTS AND ATOMS
Protons: define the element (atomic number), positive
Electrons: define the charge (bonds and polarity), negative
FUNDAMENTAL CONCEPTS
Math
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Properties of exponents
Properties of logarithms
o logb (M*N) = logb (M) + logb (N)
o logb (M/N) = logb (M) - logb (N)
o logb (Mp) = p logb (M)
Graphing slope integrals
o y = mx + b
o b is the y-intercept, m is the slope
Quadratic formula
o 𝑥=
−𝑏±√𝑏 2 −4𝑎𝑐
2𝑎
o Ex. x2 + 4x – 21
o 𝑥=
−4±√16−4∙1∙(−21)
2
o 𝑥 = −2 ± 5
o x = 3 or x = -7
Scientific notation
Dimensional analysis
Significant figures
Physics and Biology
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ATOMIC MASS AND WEIGHT
Atomic Mass: Carbon-12 (exactly 12 atomic mass unit)
Atomic Weight
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weighted average of atomic masses of element
(atomic mass · neutrons) + (atomic mass · neutrons)
MOLE A.K.A. AVOGADRO’S NUMBER
= 6.02 · 1O23
In Terms of Carbon
1 mole of 12C atoms in 12g of Carbon
6.02 · 1023 = 12C atoms in 12g of Carbon
Gram to AMU
Science
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Neutrons: define isotopes, neutral
Scientific method
Coulomb’s law: electric force between like or opposite charges;
dependence on separation distance and charge magnitude
1 gram = 1 mole of atomic mass units
1 gram = 6.02 · 1O23 amu
1 mol 27Al = 27g
2 mol 28Si = 56g
4 mol 16O = 64g