A tank contains 10,000 gallons of a solution that is 5 percent sodium chloride by volume. If 2,500 gallons of water evaporate from the tank, the remaining solution will be approximately what percent sodium chloride?
Select:
A) 1.25% B) 3.75% C) 6.25% D) 6.67% E) 11.7%
10000 gallons solution has   500 gallons sodium chloride   9500 gallons water   =&gt; 2500 gallons water evaporates   =&gt; 7000 gallons water remains   hence, concentration of sodium chloride is 500/7500 = 6.67%   ANSWER:6.67%
<result>D</result>
A tank contains 10,000 gallons of a solution that is 5 percent sodium chloride by volume. If 2,500 gallons of water evaporate from the tank, the remaining solution will be approximately what percent sodium chloride?