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Quinone which is utilized in the dye industry and in photography is an organic compound containing only C,H, and O. Explain what is the empirical formula of the compound if you find that 0.105 g of the compound gives 0.257 g of CO2 and 0.0350 g of H2O when burned completely.
When 22.63 mL of aqueous NaOH was added to 1.214 g of CHES (pKa =9.39; and MM = 207.29 g/mol) dissolved in 41.37 mL of water, the pH was 9.24. Calculate the molarity of NaOH.
undergoes beta decay with a half life of 3.1 minutes. Assume you begin with 1.0 grams of the thallium isotope, what mass of the isotope will be left after 9.3 minutes have elapsed?
Reduce the production of hazardous waste and encourage recycling and reuse of hazardous materials by charging producers a tax or fee for each unit of waste generated.
The solution is .00014% in Al3+ ion. The detection limit for aluminum is 2 mg/L using AAS. Define would the aluminum ion in this solution be detection by AAS
your expense account allows you to spend $80.00 a day when you are on a trip. If you have a week-long trip to tiny country of Kratvia, where the exchange rate is 3.50 kratvels per dollar, how many kratvels can you spend during the week? (7 day..
if you were monitring the titation by visible spectroscopy what wavelength would you select for the data analysis? why?
The "Zebra" cell was invented in 1985 in South Africa as part of the "ZEolite Battery Research Africa" project, and is used in all-electric municipal buses and other vehicles.
Determine the activation energy Ea in kJ/mol for a reaction who's rate constant k1 = 4.600 x 10(-5) at 364.00 Kelvin changes to k2 = 7.500 x 10(-3) when the temperature is changed to 790.00 Kelvin. R = 8.314 J Enter your answer in kJ.K-1mol-1
A 38.0 mL sample of 1.50 M KBr and a 61.0 mL sample of 0.630 M KBr are mixed. The solution is then heated to evaporate water until the total volume is 40.0 mL.
When a 0.0200 mol sample of SO3 is introduced into an evacuated 1.67 L vessel at 900K, 0.0132 mol SO3 is found to be present at equilibrium. What is the value of Kp for the dissociation of SO3 at this temperature?
What mass (in g) of iron is needed to evolve 730.5 kJ of heat under standard conditions as it forms iron(III) oxide
During TLC, if a solvent of too low polarity is used; the components will stay absorbed to the silica gel and not move from the starting point. Why does this occur
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