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At a particular temperature, N2O5 decomposes according to a first-order rate law with a half-life of 13.0s. If the initial concentration of N2O5 is 1.0 M what will be the concentration after 10 s.
Using standard enthalpies of formation from Appendix L, calculate Ho for the following reaction: 2 C6H6(l) + 15 O2(g) --> 12 CO2(g) + 6 H2O(g) b. How many grams of C6H6(l) must be combusted in the above reaction to produce 2570 kJ of heat energy
What is the pH at the equivalence point in the titration of 0.250M HX (Ka=6.2x10^-8) with 0.250M KOH
a typical aspirin tablet contains 500. mg of c9h8o4. what amount moles of c9h8o4 molecules and what number of molecules
For the molecule CH3COOCH3, indicate the orbitals involved in the bonding of the carbon and oxygens. Draw a picture to show how the orbitals overlap in both cases.
what is the concentration of a nitric acid solution if a 10.00ml sample of the acid reqires 31.25ml of 0.135m koh for neutralization.
The choice of precipitating reagent is important. Briefly explain what the consequences would be if excess 6M NaOH solution instead of 6M NH3 solution were used to separate Fe3+ and Al3+ ions from Ca2+, Cu2+,
A buffer is prepared by mixing 453 mL of 0.143 M HCl with 983 mL of 0.848 M ammonia (NH3). Given that the Kb of NH3 is 1.8 x 10-5, calculate the pH of the solution.
The standard enthalpy of combustion of solid urea (CO (NH2)2) is -632 kl mol-1 at 298 K and its standard molar entropy is 104.60 J K-1 mol-1, Calculate the standard Gibbs energy of formation of urea at 298 K.
the xy-plane and the C-atom skeleton lies on the x axis, what is the hybridization of C for the right-side CH2 group?
How many moles contain each of the following?
Carbonyl fluoride, COF2, is an important intermediate used in the production of fluorine-containing compounds. For instance, it is used to make the refrigerant carbon tetrafluoride
Explain how you would prepare 100.0mL of a solution, using pure solute and water, that is 0.050 M in sodium hydrogen phosphate.
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