Does anyone know how much salt is in 4 ounces of the ocean?

Question

I am doing a science fair...

Answer 1

"In average, the water of the the whole world sea has a salinity of 35 (3,5%). This means that for each liter of water of the sea it has 35 grams of you leave dissolved (most is sodium chloride, NaCl).

The water of the sea does not have salinity around uniform of the globe. The water less saline of the planet is of the Gulf of the Finlândia, in the Baltic Sea. The sea most saline is the Red Sea, in the Middle East, where the heat increases the tax of evaporation in the surface, and has little fluvial discharge."

Then there is 3,5 % of salt in the ocean's water.