Compound mn decomposes to form m and n in a reaction that is first-order with respect to mn and first order overall. the half-life for the reaction is 2.3 × 10^4 s. what is the rate constant of this reaction at 25°c? mn → m + n a) 3.0 × 10^3 s b) 1.6 × 10^(–4) s^(–1) c) 3.0 × 10^(–5) s^(–1) d) 3.3 × 10^(–4) s^(–1)

Explanation:

The reaction given follows this pattern:

1) Decomposition reaction:

2) First-order kinetic with respect to MN and first-order overall:

                               t = τ

 ∴ τ =  ln(2) / k ⇒ k = ln (2) / τ =  ln(2) / 2.3 × 10⁴ s / ln(2) = 3.0 × 10⁻⁵ s⁻¹

no, i was listening to water by schoolboy q while and i saw this question

explenation:

water isn't wet. wetness is a description of our experience of water; what happens to us when we come into contact with water in such a way that it impinges on our state of being. we, or our possessions, 'get wet'. a less impinging sense experience of water is that it is cold or warm, while visual experience tells us that it is green or blue or muddy or fast-flowing. we learn by experience that a sensation of wetness is associated with water: 'there must be a leak/i must have sat in something.'

when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.