What is the wave speed of a wave that has a frequency of 50 hz and a wavelength of 0.10 m?
what is the frequency of a wave that has a wave speed of 20 m/s and a wavelength of 0.50 m?
what is the frequency of a wave that has a wave speed of 80 m/s and a wavelength of 0.20 m?
what is the frequency of a wave that has a wave speed of 120 m/s and a wavelength of 0.40 m?
what is the wavelength of a sound wave that has a speed of 340 m/s and a frequency of 440 hz?

1. 50Hz x .10m = 5 m/s
2. 20 m/s divided by .50m = 40Hz
3. 80 m/s  divided by .20m = 400Hz
4. 120 m/s divided by .40m = 300Hz
5. 340 m/s divided by 440Hz = .77m

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.