Planets, black wholes gravity
The density of an ordinay rock is close to 3 g/cm^3 wihle the density of the paper clips is close to 8 g/cm^3 (the density of steel), then equal apparent volumes (same box) will contain different mass, being of course the mass of the box with paper clips much higher than that of the box with rocks.
The answer is (C) as the definitions states that atomic mass is the number of protons and neutrons.
Hope this helps :).
Evaporation, distillation, filtration and chromatography
Hope it help you, have a nice day
