Question

The density of aluminum is 2.70g/cm3 and the density of chromium is 7.19g/cm3. If eual masses of aluminum and chromium are transferred to equal volumes of water in separate cylinders, which cylinder would have the greates volume change.

Answer 1

The easiest way to solve this problem is to assume some convenient mass, say 5 grams.
density = mass x volume and rearrange to
volume = mass/density.
volume Al = 5/2.70
volume Cr = 5/7.19
Draw conclusions from these data.

Answer 2

the Aluminum would have the greater change in volume because it is less dense