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Ethane C2H6 undergoes combustion according the following chemical equation: C2H6(l) + 7/2O2(g) ---> 2Co2(g) + 3H2O(l). Calculate delta H knot for this reaction. 1. -1560 kJ/mol 2. -11.230 kJ/mol 3. 22,040 kJ/mol 4. -420 kJ/mol 5. 420 kJ/mol
A sample of gas has a density of 1.25 g/dm at 30 degrees C and 1.02x10^5 Pa. What is the molecular mas of this gas?
ethanol c2h5oh and gasoline assumed to be all octane c8h18 are both used as automobile fuel. if gasoline is selling for
an element t burns in air with a blue flame forming white fumes which dissolve in water to form a solution that turns blue litmus paper red(t is not the actual symbol)
The forensic technician at a crime scene has just prepared a luminol stock solution by adding 10.0 g of luminol to H2O creating a solution with a total volume of 75.0 mL. What is the molarity of the stock solution of luminol?
construct molecular models of threo- and erythro-2,3-dibromo-3-phenylpropanoic acid and show which diastereomer would be formed by anti addition of bromine to trans-cinnamic acid
Chromium metal can be plated from an acidic solution of CrO3. CrO3(aq) + 6H+(aq) + 6e- -> Cr(s) + 3H2O How many grams of chromium will be plated by the passage of 19,300 C (coulombs)?
How many mmols of Tris would you need to prepare 100 mL of a 100 mM Tris solution
a 5.08-g chunk of potassium is dropped into 1.06 kg water at 24.0degc. what is the final temperature of the water after
Construct quantum mechanical operators for the following observable: (1) the inverse separation 1/x
What is the weight percent concentration of sodium carbonate in your unknown if it takes 37.25 mL of 0.1018 M hydrochloric acid to reach the second equivalence point of the titration
Light with a wavelength of 330nm shines on a piece of metal with a threshold energy of 4.60 eV. What would you expect for the kinetic energy
500.0 mL of 0.160M solution of H3PO4 is combined with a 300.0 mL of a 0.245M solution of Ba(OH)2. What is the maximum mass of solid Ba3(PO4)2 that can be collected
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