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A 14.0-g sample of CaCl2 is dissolved in 112 g of water, with both substances at 25.0°C. Calculate the final temperature of the solution assuming no heat lost to the surroundings and assuming the solution has a specific heat capacity of 4.18 J/°C · g
At a given temperature the vapor pressures of benzene and toluene are 183mm Hg and 59.2mm Hg. Calculate the mole fraction of benzene in the vapor phase over a solution of benzene and toluene with Xbenzene=0.600
chemical kinetics - determine the time taken by a reactant to reach a particular concentration knowing the rate
What is the value of the equilibrium constant for transformation of carbon from graphite to diamond at 810.0 C?
Why do use slightly different amounts of acids (HCL and NaHSO4) from the amounts of base (NaOH). In what order should you mix the acid and base
Calculate the volume (in mL) of a 0.740 M KOH solution that should be added to 4.750 g of HEPES (MW=238.306 g/mol, pKa = 7.56) to give a pH of 7.22.
Calculate the final temperature of 34mL of ethanol initially at 20celcuis upon absorption of 739 J of heat. (density of ethanol =0.789g/mL )
The density of lead is 11.3 . The water level in a graduated cylinder initially at 205 rises to 290 after a piece of lead is submerged. What is the mass in grams of the lead?
Hydrocyanic acid is a weak acid with Ka = 4.9 x 10-10. What is the pH of a 0.4480 M hydrocyanic solution?
What is the product when phenylmagnesiumbromide (grinard reagent) is reacted with Ch3Ch2CN in ether and H3o+?
Write the structure of the carbocation formed by the protonation of C-2 or C-3 to verify that it is not allylic and therefore not as stable as the one formed by the protonation of C-1 or C-4.
A gas mixture of methane and steam at atmospheric pressure at 773.15K is fed to a reactor, where the following reactions occur: CH4+H20->CO+3H2 and CO+H2O->CO2+H2
What is the pH of a buffer solution that is 0.15 M chloroacetic acid and 0.10 M sodium chloroacetate? Ka = 1.3x10^-3.
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