Calculate the mass per day (kg/d) of lime (Ca(OH)2) - id25270082 от curtisepps 06.07.2021 20:13

Question

Chemistry: Calculate the mass per day (kg/d) of lime (Ca(OH)2) that will be required to precipitate phosphorus in a wastewater with 6.5 mg P/L. The wastewater flow rate is 10,000 m3 /d and the goal effluent P concentration is 0.1 mg P/L. Assume complete dissociation of lime in the wastewater and that the precipitation reaction proceeds at 100% efficiency according to the stoichiometric reaction below. 102+ +6P 3− +2H− ↔ (P ) (H) (s)

curtisepps · Accepted Answer

Hello!

If the frequency of a radio station is 88.1 MHz, the wavelength of the wave used by this radio station for its broadcast is 3.403 m

Why?

We are going to use the following equation that shows the relation of the frequency of a wave with its wavelength, knowing that radio waves are electromagnetic waves and they travel at the speed of light (299 792 458 m/s):

$Wavelength=\frac{Speed_{Light}}{Frequency}= \frac{299 792 458 m/s}{8.81*10^{7} Hz}=3.402865\approx3.403 m$

Have a nice day!

Calculate the mass per day (kg/d) of lime (Ca(OH)2) that will be required to precipitate

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