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A farmer applies 1700.0 kg of a fertilizer that contains 10.0% nitrogen to his fields each year. fifteen (15.0%) percent of the fertilizer washes into the river that runs through the farm. If the river flows at an average rate of 0.455 cubic feet per second. what is the additional concentration of nitrogen (expressed in milligrams of nitrogen per liter) in the river water due to the farmer's fertilizer?
A sample containing 0.0250 M concentration of a dye in a cell of 1 cm^2 cross section has a measured absorbance of 1.012 at 650 nm.
Why should reflux of the microscale reaction mixture be gentle, with the condensation ring remaining close to the surface of the liquid in the test tube.
Boron nitride, BN, has a graphite-like layered structure in which the layers have eclipsed alignment where the B and N atoms in alternative layers in the direction perpendicular to the layers. Rationalize the difference between this structure and ..
How many different types of resonance structures can be drawn for the ion SO32.
The material was used for thermal insulation in the 2003 Mars Exploration Rover. If the maximum space for insulation in the spacecraft's hull was 2294 cm3, what mass (in grams) did the aerogel insulation add to the spacecraft?
Calculate the number of moles and molality of the solution prepared by dissolving 4.00g of NaOH in 250.0g of water.
A piece of metal with a mass of 18.2 grams was dropped into a graduated cylinder containing 16.50mL of water. The graduated cylinder after the addition of the metal is 18.40. Determine the density of the metal.
cube of a silver-colored metal with a volume of 64 cm3 has a mass of 672 g. The density of pure silver is 10.5 g/cm3. Is the metal pure silver?
1) Why does a glycogen molecule have one reducing end?, From the abbreviated name of the compound galactosyl (alpha beta 1 -->1) glucose we know that,
When the electrons return to the ground state, they lose the excess energy in the form of 640 nm photons. What is the energy gap between the ground state and excited state in the laser material? answer is in J i was absent in class and my test is ..
After the vessel was pressurized with hydrogen gas and heated to 80 degrees C, the monometer showed the initial pressure inside the "bomb" to be 77.2 atm. Assuming 100% yield, calculate the pressure that should be inside the "bomb" when the reacti..
In a 50.0 L container, 4.00 moles of chlorine and 2.00 moles of bromine are placed and kept at 293.0 K until equilibrium is reached. At equilibrium there are 82.63 g of Br2
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