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A solution contains a mixture of pentane and hexane at room temperature. the solution has a vapor pressure of 258 torr. pure pentane has a vapor pressure of 425 torr and pure hexane 151 torr at room temp. What is the mole fraction composition of the mixture. (assume ideal behavior)
What is the pH when 50.0 mL of 0.100 M NaOH have been added. 4. What is the pH when 100.0 mL of 0.100 M NaOH have been added.
when magnesium metal and hydrochloric acid are reacted hydrogen gas is produced. if 4.5 liters of hydrogen is produced
Balanced thermochemical equation and enthalpy diagram, The decomposition of zinc carbonate, ZnCO3(s), into zinc oxide, ZnO(s), and CO2(g) at a constant pressure requires the addition of 71.5kJ of heat per mole of ZnCO3.
A 0.160-mole quantity of NiCl2 is added to a liter of 1.20 M NH3 solution. What is the concentration of Ni2 ions at equilibrium. Assume the formation constant* of Ni(NH3)62 is 5.5 × 108.
How many different aldols (b-hydroxyaldehydes), including constitutional isomers and stereoisomers, are formed upon treatment of butanal with base?
Working with ideal gas law, The pressure of a sample of gas at a constant temperature of 25 degrees C is increased from 1.0atm to 1.3atm
Draw the structure(s) of the carboxylic esters with the molecular formula C5H10O2 that contain a branched four-carbon chain.
Ephedrine was once used in diet pills that could be purchased without a prescription. Ephedrine is composed of 72.7% C, 9.15% H, 8.49% N, and 9.68% O. What is the empirical formula for ephedrine
the density of liquid octane, H8H18, is 0.7025g/ml. if 1.00ml of liquid octane is vaporized at 100 degrees 100'c and 725 torr, what volume does the vapor occupy?
The inital temp of the water was 25.2 degree c. At equilibrium the temp of the water and metal was 30.4 degreec -what was the change of temperature in the water
isothermally against a constant external pressure of 2.85 atm from 3.12 L to 11.85 L. Calculate the values of q, w, delta H, delta S system, delta S surroundings, delta S universe and delta G.
Draw the major isomer of 4-methylbenzaldehyde and benzyltriphenyl phosphonium chloride at room temperature mixed with NaOH
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