The concentration of sodium chloride in sea waters is approx. 35 g/L.
Approximately 97.5 percent of all the water on Earth is salt water. Of the remaining 2.5 percent that is fresh, about 70 percent exists as ice.
Water and salt form a solution, not a mixture. All solutions of NaCl in water are "salt water," but if you get the concentration of NaCl over 3.5 percent they prefer to use the term brine.
In the world,1% is fresh water,2% ice, and 97% salt water.
About 70 percent of the Earth's surface is covered in water, and about 90 percent of that is salt water.
Sea water has arround 3.5 % of salt.
The mass percent of water would be too high if heating was insufficient to remove all of the water from the hydrated salt, as some water would still be present in the compound.
50%
Salt water
yes
97%
Water with a salt concentration of about 3.5% is typically found in seawater.
75% of the water, I would assume.