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Explain how a soap removes dirt from our bodies. describe the process in relation to the secondary attractive forces that are operative.
what is the wavelength of the line in the Balmer series of hydrogen corresponding to the transition for n=5 to n=2? the constant for Balmer's equation is 3.2881*10^15 s-1
Caffeine is made up of 49.5% C, 5.2% H, 16.5%O, and 28.9% N. A solution made up of 8.25g of caffeine and 100.0 of benzene (d=0.887g/ml) freezes at 3.03C. Pure benzene (kf=5.10 degrees C/m) freezes at 5.50C.
A solution of 0.2113 g of water dissolves in 25.0 g of a solvent which freezes at 11.5 EC below the freezing point for the pure solvent. What is the Kf value for this solvent?
The concentration of the first ion to precipitate (either Al3+ or Ca2+) decreases as its precipitate forms. What is the concentration of the this ion when the second ion begins to precipitate?
Write the condensed structural formula of the ester formed when each of the following reacts with methanol. For example, the ester formed when propanoic acid reacts with methanol is CH3CH2COOCH3.
discuss how to prepare the solution in question A starting from 0.100 M formic acid and 0.150 M sodium formate
what are the H3O+ and OH- concentrarions in a 125 mL solution prepared with 0.100 mol pf NaOH and water?
A liquid has a H vaporization of 35.5kJ/mol and a boiling point 0f 122 degrees celcius at 1.00 atm.What is its vapour pressure at 109 degrees celcius.
how many milimeters of 0.755 M H2SO4 solution is needed to react with 55.0 mL of 2.50 M KOH solution? Given 2KOH (aq) + H2SO4 (aq) ------ 2H2O (I) + K2SO4
mixed in water and treated with 53.20 mL of 0.1030 M I2 (253.80amu) according to the equation C6H8O6 (s) + I2 (aq) ----> C6H6O6 (aq) + 2HI (aq)
If a mixture of gases contained 78% nitrogen at a pressure of 984 torr and 22% carbon dioxide at 345 torr, what is the total pressure of the system?
What is the freezing point of a solution prepared by dissolving 11.3 g of Ca(NO3)2 in 115 g of water?
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