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A certain reaction requires 80 minutes to reach completion in refluxing diethyl ether (bp 35 deg C). Estimate the reflux time required if the reaction is run in tetrahydrofuran (bp 65 deg C).
Calculate the equilibrium amounts if initially 0.1 moles H2 0.2 moles I2 are mixed and equilibirum is established at 300K. Kc at this temperature is 70.
Phosgene (COCl_2) has been used as a chemical agent in warfare. It blisters the lungs when breathed. Consider the following reaction: CO(g) + Cl_2(g) --> COCl_2(g). Calculate the temperature at which this reaction changes from spontaneous to non-spo..
sodium borohydride reduction experiment write the balanced equation for the reaction and calculae the percent yield
He intends to have the pH set to 10.0 . He uses acetic acid /acetate as the buffer system. Is the oH buffered in the desired range. How would you improve on Joe experiment design
What amount of solid NaOH must be added to 1.0 L of a 0.12 M H2CO3 solution to produce a solution with {H} = 3.0×10-11 M? There is no significant volume change as the result of the addition of the solid.
1.3 grams of the non-electrolyte C2 H6 O is dissolved in water and the freezing point of the solution is found to be -0.80C. (a) What is the molar mass of C2 H6 O?
An atomic emission spectrum of hydrogen shows the following three wavelengths: 1875nm, 1282nm, and 1093nm. Assign these wavelengths to transitions in the hydrogen atom.
The concentrations of lead in blood samples are often reported in units of micromoles of lead per liter of blood. Calculate the value of the concentration in these units of a blood sample containing 45 ppb lead.
The following thermochemical data are for 25oC. H0f Cp H2O(l) - 286 kJ mole-1 + 75.3 joule mole-1 K-1 H+(aq) 0 0 OH-(aq) - 230 kJ mole-1 + 148 joule mole-1 K-1 For the self-ionization of water, H2O (l) H+ (aq) + OH-- (aq) What is the value of ?H..
What is the percent yield of a reaction using 10 moles of acetone and 16 moles of benzaldehyde and obtains
1) there is a 621mL sample of O2 at 25 degree C. What is the volume at -25 degree C? 2) there are 5.22L of N2 at 13 degree C. What temperature is needed to expand the gas to 6.22L
The addition of bromine to ethene in the presence of high concentration of chloride ion in an inert solvent results in the formation of 1,2-dibromoethane and 1-bromo-2-chloroethane. No 1,2-dichloroethane is obtained. Explain above experimental fac..
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