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How does increasing the concentration of a nonvolatile solute in water affect the following properties:
Vapor pressure: DecreasesFreezing point: DecreaseBoiling point: IncreasesOsmotic pressure:
What mass (in grams) of NH4Cl is needed to prepare 450mL of 0.251 M NH4Cl solution?
a mixture of Phe (pI 5.5), Thr (pI 6.5), Asp (pI 3.0), His (pI 7.6), and Lys (pI 9.8) at pH 9.8 is loaded on an anion-exchange column and then eluted with a pH gradient of lowering pH. what order will the aminoo acids elute? Explain.
Pretend that an electron performs 1D motion in the field of the proton so that it's wavefunction is psi(x)=cos(x/a), where a=0.5 Angstrom.
Write the chemical equation and the Kb expression for the reaction of each of the following bases with water: ammonia, NH3; hydrogen sulfide, HS- ; hypochlorite ion, ClO-
What concentration of SO32- is in equilibrium with Ag2SO3(s) and 7.10 × 10-3 M Ag. The Ksp of Ag2SO3 can be found here.
Ethanol (molar mass = 46 g/mol) can be dehydrated to yield ethene (molar mass = 28 g/mol) by heating it with an excess of concentrated sulfuric acid (acting as a catalyst).
what is the molarity of a solution that contains 35.0 g of vitamin b1 hydrochloride molar mass 337 gmol in 110 g of
What is the molarity of a solution that contains 35.0 g of vitamin B1 hydrochloride (molar mass = 337 g/mol ) in 110 g of solution?
You believe your unknown compound is acetanilide that melts at 114-115 degrees, so you ask your professor for a sample of the pure compound to do a mixed melting point. You do the experiment and determine the mixed melting point is 106-110 degrees..
What is the structural formula of the geminal dichloride that is necessary to make 2,3,3,6,6,7-hexamethyloct-4-yne. I dont even know where to begin can someone please help
Determine an expression for the rate of decomposition in terms of elementary reaction rate constants and reactant and productconcentrations. What is the reaction order with respect toethylene epoxide
A sample of nitrogen gas had a volume of 500.ml, a pressure in its closed container of 740 torr, and a temperature of 25 degrees celsius. What was the new volume of the gas when the temperature was changed to 50 degrees celsius and the new pressur..
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