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Compare the molar volumes obtained in the two parts of the experiment. What difference did using twice the amount of Zn in the second part?
An ideal gas at 300K and 2.00 atm pressure in a 400 cm^3 container has its pressure increased to 5.00 atm and its volume increased to 6000 cm^3.
Use the kinetic-molecular theory of gases to explain why the solubility of a gas is proportional to its pressure over the liquid.
The mean atmospheric air temp above the pond is 10 degrees C with a relative humidity of 68%.
Figure shows current recording from a single channel. Use this figure to estimate the number of ions passing through the channel per second, when it is open.
Arrange the apparatus as shown in figure A below. Immerse the dry round bottom flask up to the neck in the boiling water.
A sample of gas has a volume of 1.00 L at STP. What is the temperature in °C if the volume is 10.0 L at 2.00 atm?
The difference in water levels between the separatory funnel (marked ?h on the diagram) and the buret serves to change the pressure of the trapped air.
Boyle's law focuses on external pressure. What might be the case if it focuses on the internal pressure? How would this aspect change Boyle's law?
Take a balance from the Tools shelf and drop it on the gas piston. Record the mass of the empty gas piston.
How does Gaussian theory for elasticity compare to actual experiments (in compression and tension), and why?
Nitrite ion, NO-2 is used as a preservative for bacon and other foods. It has been the center of controversy since it is potentially carcinogenic.
The laboratory is designed for use by 30 students. Evaluate the air available per student if the mixing factor is 0.3, and experiments last for 3 hours.
Calculate the mole percent composition of the mixture. Assume that the response of the detector (area per mole) is the same for each component.
A red-colored complex PbX4 prepared from Pb with ligand X() shows promise as a means to determine trace levels of lead in the environment.
What is the fraction of analyte in each stage and the stage number for analytes with the given distribution ratios?
Write a suggestion on the best temperature parameters to get good separation for each separate group.
The average number of theoretical plates and the average height of a theoretical plate for the column.
To test the quality of work of a commercial laboratory, 15 replicate analyses of a purified benzoic acid (68.8% C, 4.953%H) sample were requested.
How many samples are needed to confirm with 95% confidence that the pills contain at least 100 mg of riboflavin.
In developing a fluorometric method, you measure a standard Analyte at 3.00 ppm (w/w) in the matrix at three different pH values: 2,5,8.
When Ignited it decomposes in a fiery display. (NH4)2Cr2O7(s) ?N2(g) +4 H2O(g) + Cr2O3(s).
The stock solution of standard had been made with a concentration of 0.0203M. Given a 1.000cm path length and a desired absorbance.
The potassium spectrum has an intense doublet with lines at 766.494 nm and 769.901 nm. Calculate the frequency difference between the 2 lines?
Provide an interpretation for all protons in the 1H NMR spectrum of 4-vinylbenzoic acid and indicate how the 1H NMR spectrum.