Based on the MO diagram of the previous question,

1. What is the bond order of the O-H bond? [1 mark]

2. Why do we call OH a radical? [1 mark]

Which of the scenarios below are examples of cathodic protection?

1. Using a brass alloy for boat propellors.
2. Treating exposed steel surfaces with acids such as HF.
3. Using paints with pigments containing Fe²⁺ to coat bridges
4. Attaching the metal to be protected to a power supply, making it an electrode in an electrolytic cell
5. Galvanizing steel by coating it in a thin layer of zinc.

At 328 K the vapour pressure of acetone, (CH₃)₂CO, is 98.9 kPa, and that of chloroform, CHCl₃, is 84.4 kPa. What would be the vapour pressure of a solution composed of 100 g of acetone and 113 g of chloroform if it exhibited ideal behaviour (i.e. obeyed Raoult’s Law)? Give your answer in units of kPa (just type in numerical answer)

Superoxide salts are used to generate oxygen gas on space flights and submarines. Superoxides undergo hydrolysis (a reaction with water) to generate oxygen gas, hydrogen peroxide and potassium hydroxide:

2KO₂(s) + 2H₂O(g) → 2KOH(s) + H₂O₂(g) + O₂(g)              Δ_rxnH° = +64.95 kJ mol^–1    reaction 1

H₂O₂(g) → H₂O(g) + ½O₂(g)                                              Δ_rxnH° = –146.9 kJ mol^–1     reaction 2

2KOH(s) + CO₂(s) → K₂CO₃(s) + H₂O(g)                              Δ_rxnH° = –146.9 kJ mol^–1     reaction 3

KOH(s) + CO₂(s) → KHCO₃(s)                                              Δ_rxnH° = –145.0 kJ mol^–1     reaction 4

4KO₂(s) + 4CO₂(g) + 2H₂O(g) → 4KHCO₃(s) + 3O₂(g)         Δ_rxnH° = ?                           reaction 5

The Rydberg constant is given by:

where m_e is the mass of the electron, e is the charge of the electron, 𝜖₀ is the permittivity of free space (a Physics constant), h is Planck’s constant and c is the speed of light in a vacuum. The value of the Rydberg constant in our universe is 1.0973 × 10⁷ m^–1. The energy of the 1s orbital in hydrogen  is –2.18 x 10^–18 J.

The frequency of a spectral transition for a single-electron atom with nuclear charge Z is given by:

"Muonic hydrogen" is the same as regular hydrogen, only the electron has been replaced by a muon which has a mass 207 greater than the electron but has the same charge as the electron.

In regular hydrogen the emission for the n₁ = 3 to n₂ = 2 transition in the Balmer series wavelength of 656.3 nm. In "Muonic Hydrogen,' how would the wavelength for the same transition change compared to regular hydrogen:

Determine ΔG° for a cell that utilizes the following reaction:

Cl₂(g) + 2Br^–(aq) → 2Cl^–(aq) + Br₂(l)

The standard reduction for the chlorine gas is 1.360 volts and the standard reduction for the bromine liquid is about 1.075 volts.