The degradation of cf3ch2f (an hfc) by oh radicals in the troposphere is first order in each reactant and has a rate constant of k = 1.6 x 10^8 m^-1s^-1 at 4°c.
part a) if the tropospheric concentrations of oh and cf3ch2f are 8.1 x 10^5 and 6.3 x 10^8 molecules/cm^3, respectively, what is the rate of reaction at this temperature in m/s?

2.1 × 10⁻¹⁹ M/s

Explanation:

Let's consider the degradation of CF₃CH₂F by OH radicals.

CF₃CH₂F + OH → CF₃CHF + H₂O

Considering the order of reaction for each reactant is 1 and the rate constant is 1.6 × 10⁸ M⁻¹s⁻¹, the rate law is:

r = 1.6 × 10⁸ M⁻¹s⁻¹.[CF₃CH₂F].[OH]

where,

r is the rate of the reaction

If the tropospheric concentrations of OH and CF₃CH₂F are 8.1 × 10⁵ and 6.3 × 10⁸ molecules/cm³, respectively, what is the rate of reaction at this temperature in M/s?

The Avogadro's number is 6.02 × 10²³ molecules/mole.

The molar concentration of OH is:

The molar concentration of CF₃CH₂F is:

r = 1.6 × 10⁸ M⁻¹s⁻¹ × 1.0 × 10⁻¹² M × 1.3 × 10⁻¹⁵ M = 2.1 × 10⁻¹⁹ M/s

it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.

qualitative observation deals with data that can be observed with our senses: sight, smell, touch, taste, and hearing. they do not involve measurements or numbers. for instance, colors, shapes, and textures of objects are all qualitative observations.