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In a pure sample of which of the following is there no hydrogen bonding? a. CH3NH2 b. (CH3)2NH c. (CH3)N d. none, pure samples of all these have hydrogen amines
Separate samples of an aqueous solution of an unknown ionic salt are treated with dilute aqueous solutions of hydrochloric acid, sulfuric acid, and potassium hydroxide. Precipitates are formed in all three cases.
This increases to 0.010 Msec^-1 at 90 degrees C. Calculate the activation energy for this reaction.
Ammonia reacts with oxygen according tot he following equation: 4NH3+5O2=4NO+6H2O deltaHrxn = -906kJ Calculate the heat (in kJ) associated with the complete reaction of 155g of NH3.
A compound has 2 ionizable groups, with pKas of 6.2 and 9.5. A 1.0 M solution of this compound (100 mL total volume) is found to have a pH of 6.8. A biochemist adds 60 mL of 1.0 M HCl to this solution. The solution pH is now:
An equilibrium mixture contains 0.750 mol of each of the products (carbon dioxide and hydrogen gas) and 0.200 mol of each of the reactants (carbon monoxide and water vapor) in a 1.00-L container.
What ions and/or molecules are present in relatively large proportions in a solution of a weak acid H2S (aq)?
At room temperature (20), milk turns sour in about 63 hours. In a refrigerator at 3, milk can be stored three times as long before it sours.
negative or about 0. For each, indicate whether the process is always spontaneous, never spontaneous, spontaneous at high temperature or spontaneous at low temperature.
What is H in kJ for the process of freezing a 28.9 g sample of liquid silver at its normal melting point of 961 oC.
When potassium hydroxide runs out and we have to use potassium carbonate instead. Will potassium carbonate be a good titrant to use for selective precipitation?
A water treatment plant has a flowrate of 6,000 m3/d. Determine the following (assume filtration rate is 60 m3/d-m2): a. Total filter area
methyl amine (CH3NH2 Kb= 3.6x10^-4) with 25.0 mL OF 0.10 M benzoic acid (C6H5COOH Ka = 6.3x10^-5), will the resulting solution be acidic, basic, or neutral?
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