Explanation:
Given that,
The density of mercury is 13.5 g/mL
The density of Bromine is 3.12 g/cm³
It is mentioned that Mercury and bromine have the same mass. Let d₁,d₂ are the density of Mercury and Bromine. V₁ and V₂ are their volumes. So,


Since, mass is same.
So,

Hence, the volume of bromine is more than that of mercury. It is 4.32 times of the density of mercury.
Newton's first law is the answer.
Igneous <span>rock ! Of course oh how i miss middle school.........</span>
After the first 2 min the 20 g are only 10g, (1 half-life)
after other 2 more min 5g (2 half-lives)
after other 2 more min 2.5 g (3 half-lives)
after 2 more 1.25 g (4 haf lifes)
Iron is needed to prevent anemia.