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If it takes 6.5 seconds for 25 cm3 of helium gas toeffuse through a pinhole into a vacuum, how long would it take for25 cm3 of CH4 to escape under the sameconditions?
Suppose that a certain biologically important reaction is quite slow at physiological temperature (37 degrees C ) in the absence of a catalyst.
kinetics of the reaction between iodide and persulfate. procedure popet 4 ml of the idoide solution and 12 ml
Mg + 2HCl --> MgCl2 + H2 For a mass of 0.013 g Mg and 5.0 mL of 1.00 M HCl, in a flask with V = 140.612 mL at 23.5?C. Calculate the vapor pressure of H2 and vapor pressure of water.
Show how the following compounds could be synthesized from benzene a. benzoic acid b. aniline c. m-chloroenzenesulfonic acid d. m-chloroethylbenzene e. m-brombenzonitrile f. benzyl methyl ether g
If two molecules are non-superimposable but are mirror images are they enantiomers or the same molecule
If 8.8 mg of iodine-123 is used in an experiment, how many milligrams of iodine-123 should remain after 50 hours. Assume that iodine-123 has a half-life of 10 hours.
an unknown element has two naturally occurring isotopes. isotope 1 has a mass of 107.0 amu and an abundance of 55.9.
Use the following data to estimate the normal boiling point and the molar enthalpy of vaporization of lead
an 8 g sample of a copper ore was dissolved in an acid solution and then reacted with NO3- from a KNO3 salt solution. it required 71.5 ml of a .155 M KNO3 solution to fully react the copper in the ore sample.
One of the analgesics has a chiral center. Which compound is it ? One of the two enantiomers is far more effective at reducing pain than the other.
How much dry solute would you take to prepare the following solution from the dry solute and the solvent. 129g of 0.120m (molality) NaNO3
Calculate the number of grams of NaOH per 100ml to give a pH8.0 solution if pure water at pH7.0 is used in the experiment
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