Respuesta :
The concentration of salt in seawater (salinity) is about 35 per thousand. In other words, about 35 per 1,000 (3.5%) of the weight of seawater comes from dissolved salts; In one cubic mile of seawater, the weight of salt, like sodium chloride, would be about 120 million tons.
What is the ocean made of?
The oceans cover about 70% of the earth's surface and about 97% of all water on and in the earth is salty - there is plenty of salty water on our planet.
The two most common ions in seawater are chloride and sodium. These two constitute over 90% of all dissolved ions in seawater. And, lest you think seawater is useless, a cubic mile can also contain up to 25 pounds of gold (at a concentration of 0.000005 parts per million). However, before attempting alchemy on seawater, consider how big a cubic mile is (1 cubic mile contains 1,101,117,147,000 gallons).
Learn more about Seawater at:
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