Question

What two substances are found in the greatest abundance among the major salts dissolved in sea water?

Answer 1

 The salt water consists mostly of the following substances: dissolved salts (predominantly sodium (Na+ ) and chloride (Cl− ) ions.The other most abundant ions of seawater are sulfate (SO24−), magnesium (Mg2+), calcium (Ca2+), and potassium (K+). 

Answer 2

Average density at the surface is 1.025 kg/L. The two substance that can be seen in salt in sea water is sodium and chloride, seawater has approximately 35 grams (1.2 oz) of dissolved salts (predominantly sodium (Na+) and chloride (Cl−) ions). Seawater is denser than both fresh water and pure water (density 1.0 kg/L at 4 °C (39 °F)) because the dissolved salts increase the mass by a larger proportion than the volume.