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A pipe containing an ultimate (carbonaceous) BOD of 2300 mg/L flows into a stream at 1 cubic meter per minute. The stream has a flow rate of 13.8 cubic meters per minute and an ultimate BOD of 10 mg/L. Assuming a BOD reaction rate constant of -0.4/day, what will be the the BOD remaining in the stream after the combined flow has traveled for 2 days?Remaining BOD after 2 days = [BOD] mg/L
A ketone with a formula of C5H10O undergoes alkylation, but can give two isomeric products depending on the reaction conditions. Each of these potential products (A and B) has the forumla C6H12O.
A gas-filled balloon having a volume of 2.50 L at 1.2 atm and 25°C is allowed to rise to the stratosphere (about 30 km above the surface of Earth)
The absorbance at 595 was 0.75 and according to a BSA standard curve corresponding to 0.025 mg protein on the x-axis. What is the protein concentration (mg/ml) of the original protein?
A second 20ml aliquot was mixed with 10ml of 50ppm quinine solution before dilution to 100ml. The flourescence intensity of this solution was 600. Calculate the concentration in ppm in the tablet.
what is the molar concentraion of the salt solution formed n this reaction? B. what is the molar concentraion of the excess reactant once this reaction has finished?
Calcium phosphate, silicon dioxide, and coke may be heated together in an electric furnace to produce phosphorus, as shown in the following equation: 2Ca3(Po4)2+6SiO2+10C=6CaSiO3+10CO +P4
What is the molarity of a solution prepared by dissolving 13.1 g of glucose (of MW 180 amu) in 217 mL of solution?
Dry ice (solid CO2 ) has occasionally been used as an "explosive" in mining. A hole is drilled, dry ice and a small amount of gunpowder are placed in the hole, a fuse is added, and the hole is plugged.
When 0.490 kJ of heat is added to the gas, it expands and does 211 J of work on the surroundings. What is the value of delta H and delta E for this process?
A 2.42-L flask is filled with propane gas (C3H8), at 1.00 atm and -13.0°C. What is the mass of the propane in the flask.
Referring to the line representation, is the cell reaction spontaneus or non-spontaneous? Explain your answer.
Using what you know about acid/base chemistry, determine the immediate effect that two 325-mg aspirin tablets would have on the pH of the stomach. Assume your stomach is half a liter in volume.
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