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Calculate the percent purity of a sample of impure H2C2O4*2H2O if .4006 grams of this material requires a titration with 28.62mL of a KMnO4 solution, 1.000 mL of which contains 5.980mg of KMnO4.2MnO4- + 5H2C2O4 + 6H+ -------------> 2Mn++ + 10CO2 + 8H2O
What happens to the pattern if we try to determine which slit the electron goes through by using a laser placed directly behind the slits
In a chemical reaction two water-soluble ionic substances react to form an insoluble solid precipitate in a metathesis reaction. Would you expect DS to be positive, negative, or close to zero for this reaction
How do you write structural formulas for all the constitutionally isomeric compounds having the given molecular formula C3H9N,
What might you conclude about the structures of these 3 (X,Y,Z)compounds?
Propose a synthesis of ethyl neopentyl ether, C2H5OCH2C(CH3)3, from an alkyl bromide and any other reagents
Calculate the pH at the second stoichiometric point when 100 mL of a 0.020 M solution of sulphurous acid (Ka1=1.4*10-2, Ka2=6.3*10-8) is titrated with 1.5 M NaOH.
If a contemporary wooden chair were somehow preserved to for the next 3,900 years, what C-14 dacay rate should be expected from the wood used to make the chair? (t1/2 = 5730)
what is the minimum number of kilojoules needed to change 40 grams of water 100 c to stem at the same temperature and
Calculate the statistical mechanical values of Internal Energy, Entropy, Gibbs Energy, Enthalpy and Cvm for H2 (g) at 3000 K.
How much energy is required to vaporize 125g of butane at its boiling point? The heat of vaporization for butane is 23.1kJ/mol.
Assume the solubility product Mg(OH)2 is 1.7 x 10-11 at a certain temperature. What minimum OH- concentration must be attained ( for example adding NaOH) to decrease the Mg2+ concentration in a solution Mg(NO3)2 to less than 1.4 x 10-11M
Draw a mechanism for the dehydration of cyclohexanol catalyzed by phosphoric acid.
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