Step-by-step explanation:
The density of a substance can be found by using the formula
![density = (mass)/(volume) \\](https://img.qammunity.org/2021/formulas/chemistry/college/2qztd1zu9lpwav17leag2cjjn695yipoje.png)
From the question we have
![density = (85)/(110) \\ = 0.772727272...](https://img.qammunity.org/2021/formulas/chemistry/high-school/aokkstvmy7etdveq3qgucpphdrf5jcipsf.png)
We have the final answer as
0.77 g/cm³
The substance will float on water since it's density is less than that of water which is
1 g/cm³.
Hope this helps you