The density of brass is 8,600 kg/m3 or 8.6 g/mL. You have 2 kg of brass. What is the volume?
recall that density is mass per unit volume, or
d = m/V
substituting,
8600 kg/m3 = 2 kg / V
V = 2/8600
V = 0.00023256 m^3, or in mL,
V = 232.56 mL
hope this helps~ :)