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quantum efficiency of a photochemical reaction, the absorbing substance was exposed to 320 nm radiation from a 87.5 W source for 28.0 min. The intensity of the transmitted light was 0.257 that of the incident light. As a result of irradiation, 0.324 mol of the absorbing substance decomposed. Determine the quantum efficiency.
After mixing 2.00g of H2S with 2.00g of NaOH, a 92.0% yield of sodium sulfide is obtained. Calculate the experimental yield in grams obtained in that reaction
A solution containing iodide ions has a percent transmittance reading of 72.3%. what is the molarity of the iodide ion in this solution
Predict the formula and name of a binary compound formed from the following elements: (a) Na and H, (b)B and O, (c) Na and S, (d) Al and F, (e) F and O, (f)Sr and Cl.
the heat of combustion of hexane is 995.0 kcalmol. how much energy is released during the complete combustion of 453
Which of the following has the substances arranged from lowest boiling point to highest A. NaCl, C2H6, C4H10, H2O B. NaCl, H2O, C2H6, C4H10 C. C2H6, C4H10, H2O, NaCl D. C2H6, C4H10, NaCl, H2O
hydrocarbons are often reacted with steam to form h2 as shown for propanec3h8g 6 h2og ltgt 3 co2g 10 h2gcalculate kp
A gas occupies a volume of 410 mL at 27oC and 740 mm Hg pressure. Calculate the volume the gas would occupy at STP.
Consider a solution formed by mixing 60.0 mL of 0.100 M H2SO4, 30.0 mL 0.100M HOCl, 25.0 mL 0.180M NaOH and 25.0 mL 0.100 M Ba(OH)2. Calculate the pH of this solution.
What is the molality of a solution prepared by dissolving 40.0g of glucose (C6H12O6) in 4.00kg of water?
The amount of nitrogen in an organic substance can be determined by an analytical method called the Kjeldahl method, in which all the nitrogen in the organic substance is converted to ammonia.
The vapor pressure of water above this solution is found to be 0.3626 atm at 348.0 K. The vapor pressure of pure water at temperature is 0.3804 atm. Determine the value of the van't Hoff factor i for magnesium chloride in this solution
A critical reaction in the production of energy to do work or drive chemical reactions in biological systems is the hydrolysis of adenosine triphosphate, ATP, to adenosine diphosphate, ADP, as described by
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