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The bitter-tasting compound quinine is a component of tonic water and is used as a protection against malaria. It contains only C, H, N and O. When a sample of mass 0.487 g was burned, 1.321 g of carbon dioxide, 0.325 g of water, and 0.0421 g of nitrogen were produced. The molar mass of quinine is 324 g/mol. Determine the molecular formulas of quinine. (Type your answer using the format CO2 for CO2 and use the order CHNO)
What is the final temperature (in °C) of 1.53 g of water with an initial temperature of 12.0°C after 7.478 J of heat is added to it?
The following pairs of solvents/solutions are not miscible. Which of the pair would sink to the bottom of the container?
The energy of a photon is 3.16 times 10^-19J. what is the wavelength of the corresponding light. what is the color of this light.
a gas mixture composed of helium and argon has a density of 0.605gl at a 741mmhg and 298k. what is the composition of
10.0 grams of sodium bicarbonate reacts with 50.0 mL of 2 M acetic acid, what is the limiting reactant? what reactant is in excess, and by how much? what volumeof carbon dioxide gas would form?
What is the wavelength (in meters) of photons with the following energies. In what region of the electromagnetic spectrum does each appear.
If a minimum energy of 2.00x10^5 J/mol is needed for this process, what is the minimum energy needed from each photon? B. Calculate the wavelength of light necessary to provide photons of this energy
Given a 1.00 g sample of each of the following metals at 50 degrees C, which would raise 100 g of water at 25 degrees C to the highest temperature?
Give the basicity order? List from most to least basic. 3. Explain the basicity order in terms of resonance and inductive (polar) effects and solvation effects.
Calculate the pH at the points in the titration of 40.00 mL of 0.425 M NH3 for the reaction below. NH3(aq) + HNO3 ? NH4+(aq) + NO3?(aq) For NH3, Kb = 1.8x10-5.
a compound contains 10.13g of c and 89.87g of cl. determine both the empirical and molecular formulas of the compound
32.00mL of a .2500 M sodium hydroxide solution exactly neutralized a solution containing 0.5000 grams of a soluble solid acid that yields two moles of hydrogen ions per mole of acid when dissolved. Calculate the molar mass of the acid. Write balan..
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