Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question
mass of block = 5 g
volume = 15 mL
The density of the block is
[tex]density = \frac{5}{15} = \frac{1}{3} \\ = 0.33333333...[/tex]
We have the final answer as
The block will float on water since it's density is less than that of water which is 1 g/mL
Hope this helps you