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Problem- Given the following information for magnesium, magnesium oxide and oxygen, compute the second electron affinity of oxygen.
1st electron affinity for oxygen is -141 kJ/mol
1st ionization energy for Mg +738 kJ/mol
2nd ionization energy for Mg +1450 kJ/mol
Delta H sublimation for Mg +148 kJ/mol
Bond dissociation energy for O2 +499 kJ/mol
Delta H formation of MgO -602 kJ/mol
Delta H lattice- +3890 kJ/mol
Mass(volume)of cold water:75.0g Temperature of cold water: 23.0 degree celsius Mass(volume) of hot water: 75.0g Final temperature: 41.1 degree celsius find the temperature change and the calorimeter constant.
what mass of Cu is electroplated by running 20.0A of current through
Number of stereoisomers possible for each of the following substances. Draw them, and name each by the R-S and E-Z conventions.
Calculate the concentration of an pilocarpine solution with a pH = 9.34. The Kb of pilocarpine is 7.41x10-8 i need to know the steps to do problems like this one, if the steps can be simplified that would be great, thanks a lot.
A solution is made by dissolving 18.4g of HCl in 662 mL of water. Calculate the pH of the solution. Assume that the volume of the solution is also 662 mL
a 9.528 quantity of zinc was allowed to react with 40.00 of sulfuric acid that had a density of 1.3028 . the reaction
a sample of calcium hydroxide is placed into a jar containing water. the mass of the calcium hydroxide same is 1.34g.
A sample of nitrogen gas was collected over water at 20 degrees celsius and a total pressure of 1.00 atm. A total volume of 2.50 x 10^1 mL was collected. What mass of nitrogen was collected
Using the data collected for part c on your data sheet and assuming the density of the vinegar is 1.00g/mL, 1) calculate the molar concentration of acetic acid (CH3COOH) in the vinegar sample using the average volume of NaOH.
Use Coulomb's law, F = kq1 Q2 /d^2, to calculate the electric force on an electron (Q = - 1.6 \times 10^- 19C exerted by a single proton if the particles are 0.53 \times 10^ - 10m apart.
Nitrogen forms more oxides than any other element. The percents by mass of N in three different nitrogen oxides are (I) 46.69% (II) 36.85% (III) 25.94%. For each compound, determine
Question- Alkanes are compounds of carbon and hydrogen with the general formula CnH2n+2. An alkane component of gasoline has a molar mass of between 125 and 130 g/mol. What is the value of n for this alkane
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