You need to prepare 250. ml of a 0.600 m aqueous solution of sucrose, c12h22o11(aq, which is used frequently in biological experiments.

Molality is a unit of measurement for concentration that is calculated through the equation,
                               m  = moles of solute / kg of solvent
Recall that because water's density is approximately equal to 1 g/mL, 250 mL of water is also equal to 250 g or 0.25 kg. Substituting the known values,
                            0.6 = moles of solute / 0.25 kg solvent
                        moles of solute = 0.15 moles
Then, we determine the mass of sucrose by multiplying the calculated number of moles with the molar mass of sucrose (342 g/mol). The answer would be equal to 51.3 g. 

That result from subduction of oceanic plates beneath lighter continental plates. most of the earth's volcanoes are located around the pacific ring of fire because that the location of most of the earth's subduction zones.