An object floats in sea water more readily because of sea water's:
a. greater density
b. lower density
c. electrolytic flotation
d. dissolved carbon dioxide

The answer is: A. greater density.

Density of distilled water is 1 g/mL.

Density of sea water is greater than distilled water and is approximately 1.022 g/mL (d(sea water) = 1.022 g/mL).

Less dense object floats on more dence substances.

Density of a substance is its mass per unit volume.

The SI derived unit for density is the kilogram/cubic meter, but chemist usually use gram per cubic centimeter.