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Estimate the enthalpy change for the combustion of one mole of ethanol (C2H5OH) using average bond dissociation enthalpies (in KJ/mol) for C-H: 413, O-?H: 463, C-O: 358, C-C: 154, C=O: 122, and O=O: 498. Then use the estimate to calculate the heat of formation of ethanol from the heats of formation (in KJ/mol) of CO2: -394, and H2O: -242.
Your next step is to quantify the protein in the unknown mixture. Using any of the items needed above, describe how you would determine how much protein is in your sample.
how many days does it take for 16g of palladium-103 to decay to 1.0g? the half life of palladium -103 is 17days
A chemist needs to determine the concentration of a solution of nitric acid, HNO_3. She puts 865 mL of the acid in a flask along with a few drops of indicator.
If 26 of 6.6 was spilled, what is the minimum mass of that must be added to the spill to neutralize the acid?
An ionic compound contains only a metal, M, and bromine. If analysis indicates that a 3.61 g sample of the compound contains 2.44 g of M, what mass of Br in g is contained in 344 g of the mineral
The generic metal hydroxide M(OH)2 has Ksp= 6.64x10^-18. (Note: In this particular problem, because of the magnitude of the Ksp and the stoichiometry of the compound, the contribution of OH from water can be ignored. However, this may not always b..
Knowing that the arenium ion intermediate has positive charge on the ortho and para carbons, draw each resonance structure - one which shows the positive charge on the ortho carbon and one which shows the positive charge on the para carbon. You wi..
How would the value of molecular weight be affected if all of the liquid is not vaporized. Explain
What is the contribution to the internal energy from translations for an ideal monatomic gas confined to move on a surface?
What is the [OH-] in a solution that has a [H3O+] = 1 x 10-6 M?
Methane diffuses approximately 2.43 times as fast as an unknown gas. Which of the following could be and unknown gas?
Compound A is optically active and has the molecular formula C5H10O. On catalytic hydrogenation (addition of hydrogen) of A, Compound B is obtained
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