D = m/v
Given:
D: .835 g/cm3
V: 34 cm3
M: ?
M= Dxv
M= .835 g/cm3 x 34 cm3
M= 28.39 g
D. At the center of the mid-ocean ridge. because it has to be above ground
<span>Well, deep ocean trenches form on a specific type of plate boundary called a subduction zone, and these zones occur when an ocean plate collides with another ocean plate. Hope I helped.</span>