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The equilibrium constant, Kc, for this reaction is 4.6 x 10^-3. N2O4(g)<>2NO2(g). if the equilibrium mixture contains .050 M NO2 what is[N2O4]
What mass of solid sodium formate (of MW 68.01) must be added to 140 mL of 0.57 mol/L formic acid (HCOOH) to make a buffer solution having a pH of 4.16? Ka = 0.00018 for HCOOH.
A sample of propane,C3H8, contains 10.8 moles of carbon atoms. How many total moles of atoms does the sample contain?
what is the standard free energy change for thisreaction? Substance ?G°f (kJ/mol) CH3CH2OH(l) - 174.9 O2(g) 0 CO2(g) -394.4 H2O(g) -228.6 Express the free energy change inkilojoules using five significant figures. ?G° = ? kJ
A 60.00 mL sample of 0.075 M benzoic acid was titrated using 0.050 M KOH. What will be the pH at the equivalence point in the titration.
A water desalination plant is set up near a salt marsh containing water that is 0.10 M NaCl. Calculate the minimum pressure that must be applied at 17°C to purify the water by reverse osmosis.
At room temperature (20), milk turns sour in about 65 hours. In a refrigerator at 3, milk can be stored three times as long before it sours. What is the activation energy of the reaction that causes the souring of milk?
What are the Bi and Bi+ quantum numbers of the electron removed when Bi is ionized to Bi+?
H2C2O4(aq), Ka1 = 6.5 x 10-2 and Ka2 = 6.1 x 10-5. Don't forget that Kw = 1 x 10-14. Then Determine K for the reaction
Determine the mechanism for the synthesis of p-nitroacetanilide from acetanilide and HNO 3 , nitric acid and H 2 SO 4 sulfuric acid?
Determine hydroxyl and hydrogen ion concentration in this solution. (if Ka for ammonium ion = 5.0 x 10^-10.)
Limestone (CaCO3) is decomposed by heating quicklime (CaO) and carbon dioxide. Calculate how many grams of quicklime can be produced from 9.0 kg of limestone.
How many moles of nitrate ions are present in a sample that contains 4.82 moles of chromium(III) nitrate, Cr(NO3)3
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