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Sr.No.Content
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1Chemistry Website
2Basic SI Units
3Physical Constants
4Prefix used in SI System
7Concentrations
8Common Units of Mass & Weight, Length
9Particle size Conversion

Chemistry Websites

Pharmaceutical DepartmentWebsite
Warner Babcock Institute of Green Chemistry, USAwww.warnerbabcock.com
Center for Green Chemistry & Green Engineering, Yale University, USAwww.greenchemistry.yale.edu
Green Chemistry Network Center (GCNC)www.gcnc.in
Canadian Green Chemistry Networkwww.greenchemistry.ca
Environmental Chemistrywww.environmentalchemistry.com
EPA Green Chemistry Programwww.epa.gov/greenchemistry
American Chemical Society - Green Chemistry Institutewww.acs.org
Green Chemistry Networkwww.rsc.org/Membership/Networking/GCN
Greener Education Materials for Chemistswww.uoregon.edu
Royal Chemical Society, UKwww.rsc.org
Department Science & Technology, Govt. of India
(Green Chemistry Task Force)		www.dst.gov.in/about_us/ar04-05chemical.htm
International Green Chemistry Worldwww.industrialgreenchem.com

Basic SI Units

Physical DimensionSymbol for QuantitySI SymbolName of SI Units
Lengthlmmeter
Massmkgkilogram
Timetssecond
Electric currentIAampere
Thermodynamic temperatureTKKelvin
Amount of substancenMolemole
Luminous intensityIvcdcandela

Physical Constants

QuantitySymbolTraditional UnitsSI Units
Acceleration of gravityg980.6 cm/s9.806 m/s
Atomic mass unit
(1/12th of the mass of 12C atom)
amu1.6606 X 10-24 g1.6606 X 10-27 kg
Avogadro constantNa6.022 X 1023 particles/mol6.022 X 1023 particles/mol
Boltzmann constantk1.3807 X10-16 erg/K1.3807 X 10-23 J/K
Charge-to-mass ratio of electrone/m1.7588 X 108 Coulomb/g1.7588 X 1011 C/kg
Electronic chargee1.60219 X 10-19 Coulomb 4.8033 X 10-19 esu1.60219 X 10-19 C
Faraday constantF96,487 C·eq-196,487 C·mol-1
Gas constantR1.987 cal/mol. K 8.3145 kPa dm3/ mol .K 8.3145 J/ mol.K
Molar volume (STP)Vm22.710981 L/mol22.710981 X 10-3 m3/mol
22.710981 dm3/ mol

Prefix used in SI System

MultiplePrefixSymbol
10-15Femtof
10-12Picop
10-9Nanon
10-6Microµ
10-3Millim
10-2Centic
10-1Decid
10Decada
102Hectah
103Kilok
106MegaM
109GigaG
1012TeraT
1015PetaP

Concentrations

Percentage (%)Part per Million (ppm)Part per Billion (ppb)Part per Trillion (ppt)
110,00010,000,00010,000,000,000
0.11,0001,000,0001,000,000,000
0.000111,0001,000,000
0.00000010.00111,000
0.00000000010.0000010.0011
0.00000000000010.0000000010.0000010.001

Common Units of Mass & Weight

1 pound = 453.5924 grams 0.45359 kilograms 7000 grains
1 kilogram =1000 grams 2.205 pounds-
1 gram =10 decigrams 100 centigrams 1000 milligrams
1 metric ton =1000 kilograms2204.62 pounds-

Common Units of Length

1 inch =2.54 centimeters---
1 mile =5280 feet 1.609 kilometers 0.3048 meters-
1 mile =5280 feet 1.609 kilometers--
1 yard =36 inches 0.9144 meter--
1 meter =100 centimeters 39.37 inches 3.281 feet 1.094 yards
1 kilometer =1000 meter1094 yards 0.6215 mile-
1 angstrom =1.0 X 10-8 centimeter0.10 nanometer1.0 X 10-10 meter-