[stokes]

Please explain how to solve this question, and why you use your method to solve it. I am very very stuck.

Gold is present in seawater to the exteen of 0.15mg/ton. Assume the density of the seaswater is 1.03g/mL and determine how many Au atoms could concievably be extracted from 0.250L of seawater (1 ton= 2.000 x10^3; 1kg = 2.205 lB)

THanks for helping.

[enahs]

Liters of Seawater to milliliters.
Milliliters of seawater to grams (with density)

Convert 1 ton to grams.
Then grams of seawater * (0.15mg Au / grams of seawate (in one ton)
Gets you milligrams of Au in .250L of seawater. Then just convert to moles and from moles to atoms.