The world's oceans have a combined volume of 1.335 x 10⁹ km³ .

a. If the average density of ocean water is 1.029 g/mL, what is the combined mass of the world's oceans?

b. The Atlantic Ocean has a volume of 3.1 x 10⁸ km³ , and the Pacific Ocean has a volume of 6.6 x 10⁸ km³ . What percentage of the world's ocean volume is occupied by bodies of water other than the Atlantic and Pacific oceans?

c. The world's oceans are estimated to contain 3.5% dissolved solids by mass (including salts and dissolved organic compounds). If the water was "purified" by removal of these dissolved solids, calculate the mass and volume of pure water present in the world's oceans. (Assume d_water = 1.00 g/mL)

Hi, I would need the final answer along with the step by step solution( preferably under the shape of unit conversion/dimensional analysis format). Thank you!