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How much oxygen is required to support the aerobic biodegradation of the BOD5 material in a storm water + sewage overflow situation that involves a 24 h overflow of 2 500 gallons/hour into a receiving river? The overflow contained on average 80 mg BOD5 per liter.
A 2.74g lead weight, initially at 10.8Celcius, is submerged in 7.80g of water at 51.9Celcius in an insulated container. What is the final temperature of both substances at thermal equilibrium
Compute the internal energy change if an ideal gas expands from a volume of 2.3 L to 6.4 L against a pressure of 1.8 atm and 330 J of heat are transferred from the surroundings to the system.
joseph failed to calibrate the spectrophotometer. As a result, all absorbance values for the standard solutions that are measured and recorded are too high.
the sun's diameter is 1.4E9m and its effective surface temperature is 5800K. Assume the sun is blackbody and estimate the rate of energy loss by radiation from the sun
When an ionic solid is added into a solvent, you can see that the ionic solid dissociates into its respective cations and anions. The solvent molecules immediately cluster around the ions.
Consider the following balanced thermochemical equation for the decomposition of the mineral magnesite. MgCO3(s) ? MgO(s) + CO2(g) ?Hrxn = 117.3 kJ
benzoic acid is a white crystalline powder used as a foodpreservative. the compound contains 5.0 hydrogen 26.2 oxygen
7.2 liters of an ideal gas are contained at 4.0 atm and 27 °C. Using the ideal gas law, calculate how many moles of this gas are present.
A flask is filled with vapor by boiling a volatile unknown liquid in the flask. As it boils away, the vapor of the unknown pushes the air out of the flask through a tiny pinhole opening and eventually the flask is filled with an atmosphere compose..
What is the equilibrium constant, K, value (ignore units) at 441.3 K for the following reaction ? N2(g) + 3 H2(g) ? 2 NH3(g) [Note (all at 25oC): (1) Standard enthalpies of formation for N2, H2, and NH3
Balance the equation and answer in terms of moles.Chlorine gas can be produced commercially by passing an electric current through a concentrated solution of sodium chloride (brine).
The following acid-base reaction is performed in a constant pressure calorimeter. H+ (aq) + OH-(aq) ? H2O (l) ?H=-57. 32 kJ/mol The temperature of 1000.0 g of water rises from an initial temperature of 24.5 °C to a final temperature of X °C when ..
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