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Calculate the standard enthalpy of formation of methane, CH4 (g), using a C-H bond enthaply of 413 kJ mol-1 and the atomization enthalpies of 716.682 and 217.96 kJ mol-1, respectively for C and H.
Question- Determine the wavelength of the light absorbed when an electron in a hydrogen atom makes a transition from an orbital in which n = 2 to an orbital in which n = 7.
caffeine is a stimulant found in coffee and tea . a solution of caffeine in chloroform as a solvent has a concentration
Methyl benzoate - Acid and Base Organic Chemistry, In preparation of methyl benzoate, what is the purpose of 1. washing the organic layer with sodium bicarbonate solution?
A compound, C4H7ClO, has an IR spectrum showing a peak at 1810 cm-1. Its 1H NMR spectrum has peaks at delta 1.0 (3 H, triplet), 1.7 (2 H, multiplet), and 2.8 (2 H, triplet). Draw its structure
Calculate the potential delivered by a voltaic cell operating by the following reaction if all of the dissolved species have a concentration of 0.035 and the pressure of H2 (g) is 1.00 atm.
Calculate the theoretical yield when 7.0 ml of acetic anhydride , 4 drops of phosphoric acid
The Kb of ammonia is 1.8 x 10-5. What is the percent ionization of a solution of ammonia, 0.50 mol L-1 NH3, that contains 0.020 mol L-1 of ammonium nitrate, NH4NO3
Which of the following materials will react with an acid to produce a gas. A) NaOH(aq) B) Na2CO3(aq) C) both (a) and (b) D) neither (a) nor (b) Which of the following materials will react with an acid to produce a gas
A cylinder of Nitric Oxide has a volum of 10.0L and a pressure of 16.98 atm at 20 degrees Celcius, the number of moles of NO
In a titration of HNO3, you add a few drops of phenolphthalein indicator to 50.00 mL of acid in a flask. You quickly add 26.50 mL of 0.0502 M NaOH but overshoot the end point, and the solution turns deep pink.
(a) Given that the molar mass of H2SO4 is 98.1 grams, determine the number of grams of H2SO4 needed to prepare 0.2 L of a 0.5 M H2SO4 solution. Show your work.
If, at a given temperature, the equilibrium constant for the reaction H2(g) + Cl2(g) 2HCl(g) is ?6.0, then the equilibrium constant for the reaction HCl(g)
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