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Explain what are the typical values of ΔH in kJ/mol for aqueous solutions?
Explain with respect to redox reactions:
a. Is ΔH dependent on the type of metal used?
b. On the strength of the base used?
c. On the concentrations of acid used?
Chromium(III) oxide reacts with hydrogen sulfide (H2S) gas to form chromium(III) sulfide and water. 4 significant figures. Cr2O3(s) + 3 H2S(g) Cr2S3(s) + 3 H2O(l)
What is the best air/fuel ratio for an automobile engine? b) If the mixture is made leaner, What happens to the hydrocarbon emissions?
a rechargeable battery is constructed based on a concentrationcell constructed of two agag half-cells. the volume of
The Br-F bond distance in the interhalogen compound BrF is 1.76 Å. Use this information to estimate the average
In the reaction of aluminum metal and oxygen gas to make aluminum oxide, how many moles of aluminum will react with 0.80 grams O2?
Glass tempering can be accomplished by both thermal and chemical means. Each puts the near surface region of the glass piece into compression, thereby suppressing growth of surface cracks.
A solution is composed of 1.30 mol cyclohexane (Pcy=97.6 torr) and 2.50 mol acetone (Pac=229.5 torr). what is the total vapor pressure Ptotal above this solution
Draw the side reactions that occur in the preparation of tert-butyl chloride from tert-butyl alcohol. One is involving isobutylene and the other is ethyl tert-butyl ether
What information does a chemist obtain from the mass spectrum of a compound?
has a volume of 58.0L and a pressure of 645mmHg. What is the temperature, in kelvins and degrees Celsius, of the gas?
The equilibrium constant is given for one of the reactions below. Determine the value of the missing equilibrium constant. N2O4(g) + 2 NO2(g)=1.46
A 247-ln fullback runs the 40-yd dash at a speed of 19.99 +/- 0.10 mi/h and has a wavelength of 7.79E-37. What is the uncertainty in his position based on the de Broglie wavelength
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