chemistry
posted by Anonymous .
A sample of 7.83 grams of NaOH is dissolved
into 620 mL of aqueous 0.250 M NaOH (as
sume no volume change). This solution is
then poured into 1.67 gallons of water. (You
may assume that the two volumes can be
added.) What is the concentration of NaOH
in the final solution?

chemistry 
bobpursley
how much NaOH do you have in moles?
7.83/40 + .620*.250
concentration: molesNaOH/2liters
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