Question

In how many kg would 4.0 cm x 12.0 cm x 2.5 cm bar of gold weigh given the density is 19.32 g/cm^3

Answer 1

You are trying to find mass, so first multiply the volume.
4.0cm x 12.0cm x 2.5 cm = 120 cm^3

Then you plug in m=d x v
19.32g/cm^3 x 120cm^3
Remember cm^3 cancels out so you get g left

=2318.4g
Then convert g to kg
=2.3kg round to 2 sig figs