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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.

Convert ton to grams, then use density to convert to volume. Use that to determine mg Au in 250 mL seawater. Then use 6.02 x 10^23 atoms Au in 1 mol Au. I hope this helps. Post your work if you need further assistance and in detail the trouble you are having in solving the problem.

salinity cannot be measured acurately by what?

Salinity cannot be measured accurately by visual inspection.

Salinity in seawater cannot be accurately measured by taste. Taste alone cannot provide an accurate and precise measurement of salinity. Other methods, such as conductivity or refractometry, are commonly used to measure salinity accurately.

Salinity cannot be accurately measured by taste because the human taste buds are not sensitive enough to detect the small differences in salt concentration present in seawater. Taste can only distinguish between salty and not salty, but it cannot provide precise measurements of salinity. To accurately measure salinity, specialized equipment such as a conductivity meter or a refractometer is used. These instruments measure the electrical conductivity or the refractive index of seawater, which are directly related to its salinity.