The results of the catalase test in this lab indicates that:

A student prepares an amylase extract from a sample of seeds and dilutes it fivefold. They add 1 mL of this diluted amylase extract to a tube containing the reaction mixture. They then immediately add one drop of this reaction mixture to a drop plate containing iodine, and notice that at time 0, an achromic point has already been reached.

In cells, exergonic and endergonic reactions play crucial roles in metabolism and energy management. Amylase is a protein synthesized from amino acids. Which of the following statements correctly describes the formation of amylase from amino acids?

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"Muonic hydrogen" is the same as regular hydrogen, only the electron has been replaced by a muon which has a mass 207 greater than the electron but has the same charge as the electron.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

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.

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