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Calculate the vapor pressure of water above a solution prepared by dissolving 35.0 g of glycerin C3H8O3 in 140 g of water at 343 { K}. (The vapor pressure of water at 343 K is 233.7 torr.)
Determine the molarity of each of the following. be sure to show the setups by which you get the answers. Na+ and SO3(2-) in .647 M Na2SO3 Ca2+ and SO4 (2-) in .035 M CaSO4
How many grams of ethyl alcohol, C2H5OH, must be added to 1.000 kg of water so that the solution will not freeze until -20 degrees Celsius? For water, Kf=1.86 degrees Celsius/m
At what pH would the side chain of histidine exist predominately in a form that could be involved in an ionic bond?
would bromine be a more or less effective disinfectant and bleaching agent than chlorine
A local FM radio rock station in San Antonio is known to operate at a frequency 99.5 MHz. Determine the energy associated with a mole of photons emitted by this station in J/mol. (106 Hz = 1 MHz) (1/s = 1 Hz).
What is the longest wavelength of radiation with enough energy to break carbon-carbon bonds
solution x has a pH of 9.5 and solution y has a pH of 7.5. a)which solution is more acidic? b)what is the [H3O^+] in each? c)what is the [OH^-] in each
Calculate the most probable distance from the nucleus for a 1s electron in a hydrogen atom.
How many total atoms are there in each unit cell? (b) What is the volume of one unit cell in Å3? (c) Assuming that the atoms are spheres and the radius of each sphere is 1.64 Å
2 Co (NO3)3 + 3 (NH4)2 S = Co2 S3 +6NH4 NO3 How many nitrogen atoms are on each side of the equation
Calculate the concentration of the dye in solution C in units of moles per Liter Kool Aid Solution, i have a molar absorptivity of 2.41x10^4 L/mol-cm analytical wavelength of 505nm molecular weight of 496.42g/mol, absorbance of 1.528
A 15.0--mL unknown sample of aqueous acetic acid, CH3COOH(aq), was titrated using 0.800 M NaOH. If the titration endpoint was found to be 20.0 mL.
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