Page 117 - Chemistry - XI

Appendix - V
Appendix - V

Some Useful Conversion Factors

Common Units of Mass and Weight
Common Units of Volume
1 pound = 453.59 grams
1 pound = 453.59 grams = 0.45359 kilogram 1 quart = 0.9463 litre

1 kilogram = 1000 grams = 2.205 pounds 1 litre = 1.056 quarts
1 gram = 10 decigrams = 100 centigrams 1 litre = 1 cubic decimetre = 1000 cubic

= 1000 milligrams centimetres = 0.001 cubic metre
1 gram = 6.022 × 10 atomic mass units or u 1 millilitre = 1 cubic centimetre = 0.001 litre
23
–3
1 atomic mass unit = 1.6606 × 10 gram = 1.056 × 10 quart
–24
1 metric tonne = 1000 kilograms 1 cubic foot = 28.316 litres = 29.902 quarts

= 2205 pounds = 7.475 gallons

Common Units of Energy Common Units of Length

1 joule = 1 × 10 ergs 1 inch = 2.54 centimetres (exactly)
7
1 thermochemical calorie** = 4.184 joules 1 mile = 5280 feet = 1.609 kilometres
= 4.184 × 10 ergs 1 yard = 36 inches = 0.9144 metre
7
= 4.129 × 10 litre-atmospheres 1 metre = 100 centimetres
–2
= 2.612 × 10 electron volts = 39.37 inches
19
1 ergs = 1 × 10 joule = 2.3901 × 10 calorie = 3.281 feet
–8
–7
1 electron volt = 1.6022 × 10 joules = 1.094 yards
–19
= 1.6022 × 10 ergs 1 kilometre = 1000 metres = 1094 yards
–12
= 96.487 kJ/mol = 0.6215 mile
1 litre-atmosphere = 24.217 calories 1 Angstrom = 1.0 × 10 centimetres
–8
= 101.32 joules = 0.10 nanometre
= 1.0132 ×10 ergs = 1.0 × 10 metre
–10
9
1 British thermal unit = 1055.06 joules = 3.937 × 10 inchs
–9
= 1.05506 ×10 ergs
10
= 252.2 calories

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