Answer:
The answer is
0.5 g/mL
Step-by-step explanation:
The density of a substance can be found by using the formula

From the question
mass of aluminum = 2 g
volume = final volume of water - initial volume of water
volume = 19 - 15 = 4
volume = 4 mL
The density of the metal is

We have the final answer as
0.5 g/mL
Hope this helps you