A soft drink was bottled with a partial pressure of CO₂ of 3 bar over the liquid at room temperature. The partial pressure of CO₂ over the solution approaches a value of 30 bar when 44 g of CO₂ is dissolved in 1 kg of water at room temperature. The approximate pH of the soft drink is ______ $$ \times $$ 10^–1.
(First dissociation constant of
H₂CO₃ = 4.0 $$ \times $$ 10^–7; log 2 = 0.3; density
of the soft drink = 1 g mL^–1) .

An oxidation-reduction reaction in which
3 electrons are transferred has a $$\Delta $$Gº of 17.37 kJ mol^–1 at
25 ^oC. The value of E^o
cell (in V) is ______ × 10^–2.
(1 F = 96,500 C mol^–1)

The number of chiral carbon(s) present in
peptide, Ile-Arg-Pro, is _____.

The minimum number of moles of O₂ required for complete combustion of 1 mole of propane and 2 moles of butane is _____.