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Explain which of the following would absorb lower energy UV photons? What would you expect either of these substances to absorb visible light?
In organic chemistry acetone is one of the most important solvents, used to dissolve everything from waxes and fats to airplane nail polish and glue.
If a 300 MHz spectrometer was used to produce an NMR spectra of the same sample where would this same signal appear (give answer in ppm)? Using a 60 MHz NMR spectrometer a signal for a sample appea
Determine the numbers of signals will there be and which carbon will produce a signal at the highest frequency, for the carbon-13 NMR of 2,2-dimethyl-1-propanol?
Illustrate the structure of isomer1. There are three isomeric dichlorocyclopropanes. Their HNMR spectra show one signal for isomer 1, two signals for isomer 2, and three signals for isomer 3. &nbs
The solubility of O2 in water is approximately0.00380 grams per liter of water when the partial pressure of gaseous oxygen is 760 torr and the temperature is 25.0°C.
Determine the percent ionization of the cyanic acd, Ka=2.0 x 10-4, in a bufer solution that is having 0.10 M NaCNO and 0.50 M HCNO.
Find out the critical constants of this substance when the van der Waals constants for HCL area = 3.67 atm-liter2mole-2, and b= 40.8 cc mole-1.
Determine the weight of O2 necessary to fill a gas cylinder of the 100-litercapacity under the given conditions. At 00C and under a pressure of 100 atm the compressibility factor of O2 is 0.
The elementary analysis of a compound yielded the following results: H, 6.72%; C, 30.98 %; and O, 53.30%. Further, the molecular weight of the compound was found by the Dumas method to be 118.6 gmol
By use of the Berthelot equation determine the molecular weight of the vapor, and compare the result with that measured by the ideal gas law. A sample of vapor weighing 0.180 g occupies a volume of
Determine the pressure exerted by the 1.0 mol of nitrogen gas behaving as (a) a perfect gas, and a real gas which follows (b) van der Waals equation, and (c) Berthelot equation, when it is confined
How do you calculate the Km for an enzyme when you know the Vmax, enzyme concentration, and you also have a graph that has the substrate concentration versus the initial velocity plotted?
Determine the pH of a buffer solution made by dissolving the 0.10 mol of sodium format, HCOONa and the 0.10 mol of formic acid, HCOOH in the 1L of water?
Determine the density in grams per cubic centimeter of N2 at 00C and 100 atm pressure by using the Beattie-Bridgeman equation explicit in the volume.
Calculate the coefficients a and b in the Dietetic equation of state from the critical constants of Xe. Determine the pressure exerted by one mole of the gas when confined in the 1.0 L at 200C.
Determine the molarity of a solution made by dissolving th e3.4 g of Ba(OH)2 in the enough water to make 450 mL of solution? Assume that Ba(OH)2 ionizes totally in the water to Ba2+ and OH- ions.
Determine the numbers of grams of cadmium are deposited from an aqueous solution of cadmium sulfate, CdSO4, when an electric current of the1.55 A flows through the solution for 221 min?
Estimate the equilibrium constant K for the following reaction at 25°C from standard electrode potentials. The equation is not balanced.
Estimate the standard free-energy change at the 25°C for the following reaction. Use standard electrode potentials.
Determine the second viral coefficient of ammonia from its van der Waals constants. How can determine the compressibility factor (Z) from (i) Virial equations, and (ii) Redlich-Kwong equation.
In angiosperms, the transport of nutrients between the leaves and the roots occurs via the:The cells that produce the cuticle in a leaf are the:
The male gametes of angiosperms is produced by the: The female gametes of angiosperms is produced by the:
Benzene is often detected as an impurity in the synthesis of benzoic acid. How does this come about? Determine the numbers of moles of carbon dioxide are contained in the 10 g of dry ice.
Calculate the difference between the terms specific density and gravity? Which one of these is invariant, no matter which units of measurement you use, and state why?