J.R. S. answered 11/30/18
Tutor
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Ph.D. in Biochemistry--University Professor--Chemistry Tutor
Density = mass/volume
mass = 12 g
volume = 3cm x 3cm x3cm = 27 cm3
density = 12g/27 cm3 = 0.4 g/cm3 (to 1 significant figure)
Charity H.
Wow you're quite smart.10/12/20