Atoms of one element are converted to atoms of another element through transmutation or nuclear transmutation.
A Halogen is a group (or a column) on the periodic table. It contains fluorine, chlorine, bromine, and astatine!
The relationship between pressure and solubility of the gas is given by Henry's law as:

where,
is the solubility of the gas.
is proportionality constant i.e. Henry's constant.
is pressure of the gas.
(given)
(given)
Substituting the values,

To convert
to
:
Molar mass of benzene,
= 

Now for converting into
:
Since, 
So,
.
Hence, the solubility of benzene in water at
in
is
.
Answer:
one-half
Explanation:
cuz for a first order reaction is a half life independent of concentration and constant over time