GEOLOGY

Detailed explanation-1: -On average, about 35 g of salt is present in each 1 kg of seawater, so we say that the average salinity of the ocean salinity is 35 parts per thousand (ppt).

Detailed explanation-2: -The concentration of salt in seawater (its salinity) is about 35 parts per thousand; in other words, about 3.5% of the weight of seawater comes from the dissolved salts.

Detailed explanation-3: -For example, 35 parts per thousand salinity represents 35 grams of salt in 1000 grams of solution.

Detailed explanation-4: -Detailed Solution The average salinity of oceans is 35 parts per 1000. Salinity is the amount of salt in grams present in 1000 grams of water.

Detailed explanation-5: -Data from the World Ocean Atlas 2001. Seawater is water from a sea or ocean. On average, seawater in the world’s oceans has a salinity of  3.5%. This means that for every 1 litre (1000 mL) of seawater there are 35 grams of salts (mostly, but not entirely, sodium chloride) dissolved in it.