The age of water or wine may be determined by measuring its radioactive tritium content. Tritium, present in a steady state in nature, decays spontaneously by a first-order process with a half-life of 12.5 years. Calculate the age of a suspected vintage wine that is 20% as radioactive as a freshly bottled specimen. Since th ...continues
Reaction Kinetics problem (brain teaser)
In medical treatment, drugs are often applied either continuously (e.g. intravenous infusion or dermal application (like the nicotine patch) or in a series of small doses separated by a uniform time spacing (e.g. oral dosage). In any case, the goal is to ensure that the concentration of the drug in the target organ remains with ...continues
Equal volumes of two equimolar solutions of reactants A and B are mixed, and the following reaction occurs: A + B -> C At the end of 1.00 hour, A is 90% reacted. How much of A is left unreacted at the end of 2.00 hour, if the reaction is: (a) First order in A and zero order in B? The rate expression for ...continues
The reaction of a hyrogrn halide A with an olefin B to give product P according to the stoichiometric relationship: A + B -> P is proposed to occur by the following mechanism: 2A <-> A2 ( fast to equilibrium) A + B <-> C ( fast to equilibrium) A2 + C -> P + 2A (slow) (a) Based on th ...continues
A reaction occurs with the following stoichiometry A + P -> AP The concentration of A was measured versus time after mixing, the data are the following: [A](nM) Time (s) 50 0 40 100 30 229 20 411 10 ...continues
Not sure which equation to use to answer problem.
Given the moment of inertia of 12C16O is 1.457e-46kgm^2, at what temperature would the population of particles in the J=4 state be 1/8 the population of molecules in the J=0 state?
The lowest electronic states of Na(g) are tabulated below. At a temperature of 1640K A) What is the value of the electronic partition function? B) Calculate the fraction of atoms in the state i=3. Include degeneracy. Na(g) Electronic States Term symbol Energy/cm^-1 Degeneracy 2S1/2 0 2 2P ...continues
In the CO2 laser, the pumping action involves exciting N2 molecules to the v=1 state. If ~ve=2358.57cm^-1 and ~vexe=14.324cm^-1, what is the energy difference between this transition and the transition in the CO2 from the ground to 1 quanta of energy in the asymmetric stretch.
Problems deriving two equations
Consider the system of a gas adsorbed onto a surface. The gas can be treated as a two-dimensional ideal gas, and modeled as a particle in a two-dimensional box. A) derive the expression for Q and B)Derive an expression for the energy of this molecule.
For O2(g) in a 200mL container at 1500K, calculate q(trans) and the thermal wavelength.
