Consider the structure of 2,3-dimethyl-2-butene. There are twelve C923 – H bonds, and they are all identical. Nevertheless, there is more than one signal just to the right of 3000 cm-1 in the IR spectrum of this compound. Choose a correct explanation from the options below? a) The C923 – H bonds can stretch only asymmetrically. This stretching mode is associated with a different wavenumber of absorption.
b) The Csp3 – H bonds can stretch only symmetrically. This stretching mode is associated with a different wavenumber of absorption.
c) The Csp3 – H bonds can stretch neither symmetrically nor asymmetrically. It has a unique stretching mode which is associated with a different wavenumber of absorption.
d) The C923 – H bonds can stretch symmetrically, asymmetrically, or in a variety of ways with respect to each other. Each one of these possible stretching modes is associated with a different wavenumber of absorption.

What’s the question

What is the gold assay

Answerthis solution will not form a precipitateexplanationsolubility equilbrium:         pbf₂(s)  ⇄ pb²⁺(aq) + 2 f⁻(aq)the solubility product expression is    (we exclude solids from the equilibrium expression).now suppose we have the trial ion product q, which we can define as    then, we can interpret  q as the product of the concentration of the ions that we have and ksp as the product of the ion concentrations that are needed to form a saturated solution.if q > ksp, then that implies that there will be a surplus of ions that exceed the amount that is required to form a saturated solution. a precipitate will then form (the precipitate continually  forms until the surplus ions are removed and q is decreased to ksp's value).if q = ksp, the saturated solution that forms is barely saturated and the precipitate will be minimal.if q < ksp, then the ion concentration will not be enough to form a saturated solution (so no precipitate).using our information, we calculate the trial ion product:     since q = 2.7  × 10⁻⁸ < ksp =  4  ×  10⁻⁸, a precipitate will not form.

Answer: temperature? i hope this and have a wonderful