Chlor-alkali plants electrolyze NaCl to produce the commodity
chemicals caustic soda and chlorine gas. Industrial waste
effluent released into waterways from these plants can contain
trace amounts of mercury. Legally, the effluent can contain up
to 2.50 x 10-9 mol/L of mercury. Determine the minimum
volume of water, in megalitres (ML), that must be added to a
1.78 g sample of mercury to dilute the effluent to acceptable
levels.

explanation:

two years ago, when picking flowers in the mountains back of yosemite valley, i found a book. it was blotted and storm-beaten; all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however; many of the inner pages were well preserved. and although all were more or less stained and torn, whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today; its granite pages have been torn and blurred by the same storms that wasted the castaway book.

two years ago, when picking flowers in the mountains back of yosemite valley; i found a book. it was blotted and storm-beaten, all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however, many of the inner pages were well preserved. and although all were more or less stained and torn; whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today, its granite pages have been torn and blurred by the same storms that wasted the castaway book.