The total volume of seawater is 1.5 ×10^21 L. Assume that the seawater contains 3.1% sodium chloride by mass and its density is 1.03 g/mL. Calculate the total mass of sodium chloride in tons.

Question

The complete question is The total volume of seawater is 1.5 ×10^21 L. Assume that the seawater contains 3.1% sodium chloride by mass and its density is 1.03 g/mL. Calculate the total mass of sodium chloride in tons. Solution and explanation please. TIA!

Answer 1

1.03g/mL=1.03kg/L.

1.5E21 L has a mass of 1.5×1.03E21=1.545E21kg.

3.1%=0.031 of this is sodium chloride=0.047895E21=4.7895E19 kg.

(E19 means ×10¹⁹)

A metric tonne is 1,000kg so the mass is 4.7895E16 tonnes.

1 ton=1.01696 tonne. The mass in imperial measure is 4.71 ton approx.