Answer:
The answer is
1.30 g/mL
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
mass of object = 6.9 g
volume = final volume of water - initial volume of water
volume = 30.4 - 25.1 = 5.3 mL
It's density is
![density = (6.9)/(5.3) \\ = 1.30188679...](https://img.qammunity.org/2021/formulas/chemistry/high-school/2xvgf9iuuiob7fe88ll3wb2knzwjfuyo86.png)
We have the final answer as
1.30 g/mL
Hope this helps you