A gas bubble has a volume of $0.650\; mL$ on the seafloor under a pressure of $3.46\;atm$. What would be the volume of this bubble near the surface. if we suppose that temperature is constant ?
At the surface. pressure is $1\; atm$..
As temperature remains constant. we turn to Boyle and Mariotte:
$P_1V_1=P_2V_2$.
$V_2$ $=$ $\frac{P_1V_1}{P_2}$ $=$ $\frac{3.46\cdot 0.00065}{1}$ $=$ $2.24\cdot 10^{-3}\; L$ $ =$ $ 2.24\; mL$.
