V (volume) = 5l
c (molar concentration or molarity) = 3 M = 1 mol/l
c = n/V, where n is the number of moles or amount of substance
So: n = c * V = 3 mol/l * 5l = 15 moles
the answer is epipelagic zone
<span>The crust and the upper layer of the mantle together make up a zone of rigid, brittle rock called the lithosphere. </span>
