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A compound contains merely carbon, nitrogen, hydrogen and oxygen. Combustion of 0.341 g of the compound produced 0.533g of CO2 and 0.150 g of H2O. In another experiment, 0.216 g of the compound produced 0.0817 g of NH3. Explain what is the empirical formula of the compound? Combustion involves reacting with excess O2. Presume that all the carbon ends up in CO2 and all the hydrogen ends up in H2O. Also presume that all the nitrogen ends up in the NH3 in the second experiment.
The rate constant for a reaction is 1.6 x 10^-2 s^-1 at 680k and 4.6 x 10^-2 s^-1 at 890 K. What is the activation energy?
what weight of a can be removed from a soluton that contains 6.00 grams of a in 50.0-mls of water by a single
(i) Propose two resonance forms (that respect the octet rule and energetically nonequivalent) contributing to the structures for each of the following molecule and ion.
Beta sheets are a type of secondary structure in proteins. A segment of a single chain in an antiparallel. sheet has a length of 291 Å . How many residues are in this segment
If aqueous solutions of Na2SO4 and BaCl2 are mixed, a white precipitate forms. What is the identity of the precipitate
Suppose that a fully charged lead-acid battery contains 1.50 of 5.00 . What will be the concentration of in the battery after 3.90 of current is drawn from the battery for 5.50
Consider the reaction Pb(s) + 2H^+(aq) ? Pb^2+(aq) + H2(g). If the hydrogen gas pressure is maintained at 1.00 atm and the lead(II) ion concentration is 0.025 M, find the pH at which this reaction is at equilibrium.
A 45.0-rm mL sample of this glucose solution was diluted to 0.500 rm L. How many grams of glucose are in 100. rm mL of the final solution?
1.it is noted that an iron nail was with the 12gms mass absorbs heat of 15 joule you need to calculate the final
Starting with d-talose (you can find this in the book or online) draw the \(\beta\) -anomer of its pyranose Haworth structure.
Calcuate the number of moles of O2 needed to react with 13.2 grams of Fe givven the balanced equation 2Fe2O3 (S)
AS you get to the mountains the temp drops to -1C and 0.70 atm. If the volume of air in the tires is 12L when you left the city, what will it be in the mountains
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