Common oxidation states of mercury are +1 and +2. in the +1 oxidation state, mercury forms a diatomic cation. in the +2 oxidation state, mercury is a typical monatomic cation.
mercury(i) = hg2^2+
mercury(ii) = hg^2+

give formulas for the following mercury compounds.
mercury(i) bromide

in the given question, the partial pressure is calculated by using the ideal gas equation, that is, pv = nrt

here, p is pressure, v is volume = 25 l, n is number of moles = 0.0104 moles, r is gas constant = -0.0821 l.atm / mol.k

t is temperature = 273 k

p = nrt / v

p = (0.0104 mol × 0.0821 l.atm / mol.k × 273 k) / 25 l

= 0.0093 atm