CHEM 1411 FORMULAS/TABLES (TEST-3)-chapter-7,8,9
Transcript of CHEM 1411 FORMULAS/TABLES (TEST-3)-chapter-7,8,9
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CHEM 1411 – FORMULAS/TABLES (TEST-3)-chapter-7,8,9
ENERGY OF THE PHOTON:
Photoelectric Effect Photon with energy (h ) hits the metal M and this energy is used to remove an electron
(W = is the binding energy of electron to the metal) and the remaining energy portion
is used to increase electron’s kinetic energy KE:
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Mass of electron = The mass of an electron is = 9.1 × 10–31
kg.
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Valence electrons are the outer shell electrons of an
atom. The valence electrons are the electrons that
participate in chemical bonding.
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CHEM 1411 Formulas and Constants
mass of proton = 1.00728 amu mass of neutron = 1.00866 amu
c = 3.00 X 108 m/s F = 96500 C/(mol of e
-) = 96500 J/(V mol of e
-)
K = oC + 273.15 R = 0.08206 (L atm)/(mol K) = 8.314 J/(mol K)
1 g = 6.022 X 1023
amu 1 atm = 760 mm Hg
1 mL = 1 cm3
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Temperature scales/Conversion:
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• TK = TC + 273 (Celsius to Kelvin)
• TC = TK – 273 (Kelvin to Celsius)
• TF = (1.8TC) + 32 (Celsius to Fahrenheit)
Section 5.1
• TC = (TF 32 ) / 1.8 (Fahrenheit to Celsius)
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Percent by mass = mass of solute 100%
[mass of solute + mass of solvent]
Two-component solution:
Mole fraction of solute A: XA = moles of solute A
moles of solute A + moles of solvent B
Molarity = number of moles of solute in 1 L of solution:
Molarity = moles of solute
Liters of solution
Molality = number of moles of solute dissolved in 1 kg (1000 g) of solvent:
Molality = moles of solute
Mass of solvent (1 kg)
Density = Mass / Volume.