Question

Iron has a known density of 7.87 g/cm3. What would be the mass of a 2.5
cm3 piece of iron?

Answer 1

if i am not mistaken ,

density = mass / volume

density = 7.87 g/cm3
volume = 2.5 cm3

thus ,
mass = density x volume

7.87 g/cm3 x 2.5 cm3 = 19.675 g