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A sample of an unknown biochemical compound is found to have a percent composition of 59.01% carbon, 7.15% hydrogen, 7.65% nitrogen and the balance oxygen. Explain what is the empirical formula for the compound
What would the internal energy of the gas be if it were compressed to .10 m^3 while the pressure was held constant?
Discuss the differences observed in the IR and NMR spectra of 3-nitrophthal-hydrazide and luminol that are consistent with reduction of the nitro function to an amino group in this experiment.
A 0.1000 m aqueous solution of a weak acid, HA, is 1.5% ionized. At what temperature does it freeze? Kf for water = 1.86°C/m.
A 4.30 g nugget of pure gold absorbed 293 J of heat. The initial temperature was 29.0°C. What was the final temperature?
a 260.0 ml buffer solution initially contains2.5times10-2 mof hcho2 and2.5times10-2 m of nacho2. inorder to adjust the
the volume of NaOH needed to neutralize it and repeats the process several times to determine the concentration of the NaOH solution. She calculates the concentration and uncertainty in the concentration of the NaOH from the titration data.
when the level in the arm connected to the container is 766.0 mm in height higher than the level in the arm open to the atmosphere? Atmospheric pressure is 754.2 mm Hg and the density of mercury is 13.546 g/mL.
Starting with a 10% solution and making a series of 1:100 dilutions, how many dilutions must you make to prepare 0.1 ppm (part per million) solution. How many ppb's (parts per billion) is this concentration
a0.032-m aqueous sample of species x was analyzed by atomic absorption spectroscopy at 525 nm and in a 1.00-cm celland
q1. calculate the number of moles of ammonia absorbed by a boric acid solution if 3.25 ml of 0.0025 m h2so4 were needed
If your methanol was wet (contained water), what compound would be formed and isolated along with trityl methy ether. Explain and what effect would that have on the melting point of the product
di ethyl ethal is a volatile, highly inflammable organic liquid that is used mainly as a solvebt. the vapour pressure of di ethyl ethal is 4.01mmHg at 18 degree celcius.
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