Answer
8.9 g
Work Step by Step
We have 3.5% NaCl by mass and 254 g of sea water.
Accordingly, the conversion factor is:
3.5g NaCl/100 g sea water.
Calculating the mass of NaCl by using the conversion factor.
= (254 g sea water)x(3.5g NaCl/100 g sea water.)
= 8.89g NaCl
Hence the mass of sodium chloride is 8.9g.