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Solid sodium peroxide (Na202) reacts with liquid water yielding aqueous sodium hydroxide and oxygen gas. How much heat is released when 250.0 L of oxygen gas is produced from the reaction of sodium peroxide and water if the reaction is carried out in an open container at 1.000 atm pressure and 25 degrees Celsius?(Given: delta H of formation[Na2O2 (s)]= -510.9 kJ/mol ;delta H of formation[NaOH (aq)] = -469.2 kJ/ mol ;delta H of formation [H2O(l)] = -285.8 kJ/mol
the critical temperature of the mixture is known to be 200 F. Compare your answer with the critical pressures of pure methane and pure n-hexane.
Classify Na2C2H3O and Cu(NO3)2 as weak, strong or non-electrolyte in aqueous solution.
Calculate the concentrations of all species in a 1.73 M Na2SO3 (sodium sulfite) solution. The ionization constants for sulfurous acid are Ka1 = 1.4× 10-2 and Ka2 = 6.3× 10-8.
Three bulbs are connected by tubing, and the tubing is evacuated. The volume of the tubing is 35.0 mL. The first bulb has a volume of 35.0 mL and contains 8.84 atm of argon, the second bulb has a volume of 250 mL and contains 2.18 atm of neon
Calculate the pH of a solution prepared by mixing 15.0mL of 0.10M NaOH and 30.0mL of 0.10M benzoic acid solution. (Benzoic acid is monoprotic; its dissociation constant is 6.5x10^-5.)
A sample of Nitrogen gas expands in volume fro 1.6 L to 5.4 L at constant temperature. Calculate the work done (in joules) if the gas expands
The first-order reaction SO2Cl2 --> SO2 + Cl2, has a rate constant of 2.20 x 10^-5 s^-1 at 593 K. What percentage of the initial amount of SO2Cl2 will remain after 2.00 hours
If 0.015 M NaCl shows conductivity of 12,000 units, based on "total ion concentration" what conductivity should be observed for 0.030 M Na2SO4?
Dissolution of 0.0050 mol of Cr( OH )_3} in 1.0 L of 1.0 M NaOH gives a solution of the complex ion Cr( OH )_4^-}; Kf} = 8 10^{29}). What fraction of the chromium in such a solution is present as uncomplexed Cr^{3+}}
What is the effect of dissolved soap (soapy water v. plain water) on the pattern of diffusion of blue dye in water?
Calculate SO (universe) for the formation of 1.00 mol of HCl (g) from gaseous hydrogen and chlorine at 25 OC. Is the reaction spontaneous at that temperature
A student is asked to react 3-methyl-2-butanol with HBr. predict the products and explain why the experiment will not be as successful for production of an alkyl bromide as the reaction of 1-butanol with HBr
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