Question 170376
Normal sea water is about 3.5% solids. This is about the same as saying
 "There are nearly 300 pounds of dissolved solid matter per thousand gallons
 of sea water" Using this information, find the weight of a gallon of sea water.
:
Let x = weight of 1 gallon of sea water in pounds
:
.035 = {{{300/(1000x))}}
.035(1000x) = 300 
:
35x = 300
x = {{{300/35}}}
x = 8.57 lb per gallon of sea water