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50.0 ml each of NaOH (aq) and HCl (aq), both at a concentration of 1.00 M and a temperature of 20.5°C, are mixed in a styrofoam coffee cup calorimeter. The final temperature of the system is 27.3°C. The resulting 0.500 M NaCl (aq) has a density of 1.02 g/ml, and a specific heat of 4.02 J/g-deg. What is the value of ?H in kJ/mole or the reaction?NaOH (aq) + HCl (aq) ? NaCl (aq) + H20 (l)
At the equivalence point of the titration of formic acid by NaOH, the pH of the solution is around 8 - 10. What would be a good indicator
Calcium metal has a density of 1.55g/cm3 and crystallizes in a cubic unit cell with an edge length of 558.2pm. a. how many Ca atoms are in one unit cell?
Balance the equation in acidic solution and determine how much of a 0.850 M K2Cr2O7 solution is required to completely dissolve 5.25 g Cu
Calculate the amount of energy that would be required to promote an electron from n=1 to n=100 in Li^2+
Assuming that the gas is at standard temperature and pressure there is 1.00 mole per 22.4 L of volume how many argon atoms are there present in this sign
A voltaic cell made of a Cr electrode in a solution of 1.0 M in Cr^3+ and a gold electrode in a solution that is 1.0 M in Au^3+.
A solution of calcium ions contains 7 meq/250. cm3 of calcium ion. How many moles of calcium ion does this solution contain
A mixture of sand and iron pieces weighs 53.29 g. Using a magnet, the iron is removed and weighs 15.63 g. What is the percent composition of sand in the mixture?
Write a balanced net ionic equation for the reaction of KMnO4 with the saturated solution of CdC2O4 in diluted H2SO4. The major products are Mn2+ and CO1
The following data were obtained for the decomposition of N2O5 in the presence of 1 atm. N2 at 298 K.time (hr.) P(N2O5) atm P(N2O5) P(N2O5) P(N2O5) (for P(N2)=5 P(N2O5) (atm))
calculate the change in the entropy of the universe between the time that the contents of the glass enter the lake and when thermal equilibrium is subsequently restored. State any approximations made in your calculation.
There are three isomeric dichlorocyclopropanes. Their 1H NMR spectra show one signal for isomer 1, two signals for isomer 2, and three signals for isomer
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