Answer:
The answer to your question is: density = 0.175 g/cm3
Explanation:
Data
v1 = 215 cm3
density1 = 0.11 g/cm3
v2 = 135 cm3
mass = ?
Formula
density = mass/volume
First, calculate mass
mass = density x volume mass = 0.11 X 215 = 23.65 g
Now, calculate density with the second volume
density = 23.65 g / 135 cm3
density = 0.175 g/cm3