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Serotonin, composed of C, H, N, and O, facilitates neuronal communication. The molar mass of serotonin is 176.00 g/mol. By combustion of a 7.29 g sample, serotonin was found to contain 18.2 g carbon dioxide, 4.47 g water, and be 15.9% nitrogen. Determine the empirical and molecular formulas of serotonin.
At a given temperature the vapor pressures of benzene and toluene are 183 mm Hg and 59.2 mm Hg, respectively. calculate the mole fraction of benzene in the vapor pressure over a solution of benzene and toluene with xbenzene =0.600
The reaction caused the temperature of the solution to rise from 22.06 C to 26.42 C. If the solution has the same density and specific heat as water, what is deltaH for this reaction (per mole of H2O produced)?
what volume of a concentrated solution which is 36.0 by mass and has a density of 1.179 should be used to make 5.00 of
Explain in your own words why an organic chemist would say structure determines properties.
how many days does it take for 16g of palladium-103 to decay to 1.0g? the half life of palladium -103 is 17days
The complete combustion of pentane releases 243 kj on the basis of this information calculate the value of delta H for the complete combustion of one mole of pentane
Calculate the mass of glucose metabolized by a 79.7 kg person in climbing a mountain with an elevation gain of 1530m . Assume that the work performed in the climb is four times that required to simply lift 79.7kg by 1530m.
Calculate DE, and determine whether the process is endothermic or exothermic for the following cases: q = -142 kJ and w = -530 kJ.
Write the structures (or name the structures) for the major monobromination products that would be formed from each of the following substrates used. Explain your predictions.
A sample of gas occupies 721 mL at 1.00 atm. The pressure is increased to 1.1 atm (the temperature stays the same). What is the new volume of gas in mL?
Write a balanced half-reaction for the oxidation of chromium ion (Cr^3+) to dichromate ion (Cr2O7^2) in acidic aqueous solution. Be sure to add physical state symbols where appropriate
an auto technician spills 85 ml of 2.6 m h2so4 solution from a rebuilt auto battery. how many milliliters of 2.5 m
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