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 +== '''Also see''' ==
 +* '''[[Water]]'''
 +* '''[[Salt]]'''
 +== Reference ==
# Wikipedia see ''Seawater'' [] # Wikipedia see ''Seawater'' []

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Seawater or Saltwater is water from a sea or ocean. On average, seawater in the world's oceans has a salinity of about 3.5%. This means that every kilogram, or every litre, of seawater has approximately 35 grams (1.2 oz) of dissolved salts (mostly, but not entirely, the ions of sodium chloride: Na+, Cl−). The average density of seawater at the ocean surface is 1.025 g/ml; seawater is denser than fresh water (which reaches a maximum density of 1.000 g/ml at a temperature of 4 °C (39 °F)) because of the salts’ added mass. The freezing point of sea water decreases with increasing salinity and is about −2 °C (28.4 °F) at 35 g/L.

[edit] Also see

[edit] Reference

  1. Wikipedia see Seawater [1]

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