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Environmental Conversion factors and formulas for constants
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Basic Units |
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Aditional Units |
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Quantity |
Name |
Symbol |
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Physical quantity |
Unit |
Name |
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length |
meter |
m |
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Volume |
liter=1000 cm(3)=10(-3)m(3) |
liter (l) |
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mass |
kilogram |
kg |
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ml = cm(3) = 10(-6)m(3) |
milliliter |
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time |
second |
s |
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Density |
g cm(-3) = g/ml |
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degree |
kelvin |
K |
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Molar concentration |
M = mol 1(-1) |
molarity |
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number |
mole |
mol |
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Length |
A = 10(-10)m = 0.1 nm = 100 pm |
angstrom |
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current |
ampere |
A |
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Pressure |
atm=760 torr=101.325x10(3)Nm(-2) |
atmosphere |
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torr = 1.32 x 10(-3) atm |
torr |
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Symbol |
Prefix |
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E |
exa |
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10(18) |
1,000,000,000,000,000,000 |
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P |
peta |
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10(15) |
1,000,000,000,000,000 |
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T |
tera |
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10(12) |
1,000,000,000,000 |
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G |
giga |
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10(9) |
1,000,000,000 |
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M |
mega |
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10(6) |
1,000,000 |
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k |
kilo |
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10(3) |
1,000 |
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h |
hecto |
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10(2) |
100 |
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da |
deka |
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10(1) |
10 |
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d |
deci |
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10(-1) |
0.1 |
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c |
centi |
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10(-2) |
0.01 |
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m |
milli |
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10(-3) |
0.001 |
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µ |
micro |
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10(-6) |
0.000,001 |
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n |
nano |
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10(-9) |
0.000,000,001 |
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p |
pico |
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10(-12) |
0.000,000,000,001 |
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f |
femto |
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10(-15) |
0.000,000,000,000,001 |
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a |
atto |
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10(-18) |
0.000,000,000,000,000,001 |
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Conversion Factors (Energy) |
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1 electron volt (eV) = 1.60 x 10(-19) J |
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1 erg = 6.24 x 10(11) eV = 2.39 x 10(-11) kcal |
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1 kcal = 4.184 kJ |
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1 volt coulomb = 1 joule = 10(7) ergs = 2.39 x 10(-1) cal |
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1 atomic unit (au) of energy = 27.21 eV molecule(-1) = 4.36 x 10(-18) J molecule(-1) |
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Physical Constants |
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c |
Velocity of Light |
3.00 x 10(8)m s(-1) |
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h |
Planck's Constant |
6.63 x 10(-34) Js |
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N(Sub)A |
Avogadro's Number |
6.02 x 10(23) mol(-1) |
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F |
Farady's Constant |
2.89 x 10(14) esu mol(-1) |
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9.65 x 10(4)C mol(1-) = 9.65 x 10(4)JV(-1) |
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2.31 x 10(4) cal V(-1) mol(-1) |
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V(Sub)O |
Molar Volume of Gas at STP |
22.4 1 mol(-1) |
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k |
Boltzmann's Constant |
1.38 x 10(-23) J K(-1) molecule(-1) |
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e |
Charge on the Electron |
4.80 x 10(-10) esu (cm3/2g1/2s(-1)) |
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1.60 x 10(-19) C |
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m(Sub)e |
Mass of the Electron |
9.11 x 10(-31)kg |
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amu |
Atomic Mass Unit |
1.66 x 10(-27)kg |
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R |
Gas Constant |
0.082 1 atm K(-1) mol(-1) |
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8.31 J K(-1) mol(-1) |
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1.99 cal K(-1)mol(-1) |
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a(sub)O |
Bohr Radius |
0.529 A = 52.9 pm |
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K(Sub)W |
Dissociation Constant Water |
1 x 10(-14) |
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2.303 RT = 1.364 kcal mol(-1) = 5.71 kj mol(-1) = 0.0592 V at 298 K |
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