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Oxalate ion, C2O4 2-, and permanganate ion,MnO4 -1,react in aqueous basic solution to give carbonate ion, CO3 2-, AND solid manganese dioxide,MnO2. What is the complete and balanced equation
If the initial concentration of AB is 0.210 M , and the reaction mixture initially contains no products, what are the concentrations of A and B after 70 s
An electrochemical cell is constructed in which one half-cell contains AgN03 solution in contact with an Ag strip, and the other half-cell contains magnesium nitrate solution, Mg(N03h, in contact wi
A certain reaction with an activation energy of 195 K was run at 535K and again at 555 K What is the ratio of f at the higher temperature to f at the lower temperature
Draw three non-equivalent Lewis structures for the nitrous N2O molecule. Show all non-zero formal charges. Which structure(s) is (are) the most important
The electron in a hydrogen atom occupies a 6p orbital. What is the longest wavelength of light that can be emitted by this atom? Give answer in nanometres, nm
xygen, contained in a 1.0-L vessel at 4.0atm, is transferred to a 5.0-L vessel containing only Argon, Ar, at 2.0atm. What is the final total pressure in the 5.0-L vessel? Assume that there is no cha
The groups in the periodic table are numbered 1 through 18. What are the group numbers of the groups for which the atoms are all diamagnetic in their group electronic states.
In which of the following reactions would increasing pressure at constant temperature not change the concentrations of reactants and products, based on Le Ch telier's principle
The standard enthalpies of combustion for ethanol and dimethyl ether are -1367kJ mol-1 and -1460kJ mol-1, respectively, at 298K. what is delta U at 298K for the purposes below:
a nitrile (RCN) is converted to what functional group when treated with LiAlH4 followed be an aqeous workup a carboxylic acid is converted to what functional group when treated with LAH followed by an
the lowest energy product formed in an aldehyde is treated with secondary amine in the presence of trace acidthe lowest energy product formed in an aldehyde is treated with secondary amine in the pr
The difference in the mercury levels in the two arms of the manometer was 11.8 cm. Atmospheric pressure was 783 mm Hg. The pressure of the argon in the container was __________ mm Hg.
A closed-end manometer was attached to a vessel containing argon. The difference in the mercury levels in the two arms of the manometer was 11.8 cm. Atmospheric pressure was 783 mm Hg. The pressure
A sample of a gas originally at 29°C and 1.25 atm pressure in a 3.0 L container is allowed to contract until the volume is 2.2 L and the temperature is 11°C.
Calculate the molarity of chloride ions when HCl is added to Co(NO3)2 ? (this is the cobalt complex and chloride experiment)
Illustrate this by showing the reaction of trans-p-anisalacetophenone with bromine and 2,4-dinitrophenylhydrazine to give the corresponding products
THe energy of a photon is 4.54 10-19 J. What is the wavelength of the corresponding light
How can the molarity of chloride ion be calculated when 16 mL (2 mL intervals) of 12 M HCL is added to 5 mL of 0.4 M CO(NO3)2?
The standard reduction potentials listed in any reference table are only valid at standard-state conditions of 25 C and 1 M. To calculate the cell potential at non-standard-state conditions, one use
What is the [OH-] of a buffer that consists of 0.700 M methylamine CH3NH2 and 0.848 M methylammonium chloride CH3NH3Cl? pKb of methylamine is 3.35. Use E notation and 3 significant figures.
How can I find the pH and volume (mL) of 0.0411M KOH needed to reach the equivalence point in the titration of 23.4mL 0.0390M HNO2? The question doesn't give me a Ka or Kb value.
Calculate the hydronium ion concentration and the pH after the addition of 0.25 mL of 0.10 M HCl to each one. What accounts for the difference in the hydronium ion concentrations