2007-06-20 06:15:38 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Earth Sciences & Geology
3 per cent by weight is a commonly-used global average.
2007-06-20 08:50:43 · answer #1 · answered by Anonymous · 1⤊ 1⤋
Sea water is much more concentrated than the saline solution found in almost all creatures. Sea water is about 3.5% salt by weight, or 3.5 grams in 100 grams of water. By contrast, human serum (as well as tears) is 0.9% salt, or 0.9 grams in 100 grams of water.
Surprisingly, this concentration of 0.9% salt is fairly consistent throughout the animal kingdom, even for those that live in the oceans. The reason, of course, is that life evolved at a time when the seas were much less salty than they are now, and they have continued to try to maintain that ancient sea chemistry in their bodies since then.
2007-06-20 06:35:22 · answer #2 · answered by Anonymous · 2⤊ 0⤋
The concentration of the NaCl changes depending on the location of the ocean, not all oceans have the same amount. There are numerous aspects that determine the salinity of the ocean: amount of sunlight, amount of photosynthetic organisms, location in relation to equator, offshore/onshore pollution, etc.
2007-06-20 07:00:00 · answer #3 · answered by bnhawk03 3 · 2⤊ 0⤋
You also have to remember there are other salts besides NaCl in seawater. Like KCl and MgCl.
2007-06-20 06:28:44 · answer #4 · answered by Lady Geologist 7 · 1⤊ 2⤋
0.085 % or 85,000 mg/L (= 85,000 PPM)
Same concentration as found in human blood.
2007-06-20 06:26:13 · answer #5 · answered by wds_55 2 · 1⤊ 3⤋