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An amount of sucrose (a nonelectrolyte, 342.30 g/mol) is dissolvedin 233.0 grams of water that increases the boiling point by 1.90oC. How many grams of the sucrose were added to the purewater? Kb for water is 0.520 oC kgmol-1
the resulting solution required 38.10mL of 0.08765M AgNO3(aq)to precipitate the Cl(aq) and BrCl(s)and AgBr(s) calculate the mass percetage of NaCl(s)in the mixture
What polypeptide would be synthesized from the following template strand of DNA:3' CGG AGA CGG ACG 5'
What volume (L) of H2 at 745 torr and 20.oC can be prepared from 4.8 g of water? (Atomic weights: Fe = 55.85, O = 16.00, H = 1.008; 1 atm = 760 torr).
Calculate the pH across the inner mitochondrial membrane that is necessary to drive ATP synthase under steady state conditions at 25oC
Describe, in as much detail as possible, the process of recrystallization as a method for purification of a solid. How does it work. What do you do
What is the new pressure, in atm,when the air is placed in tanks that have the following volumes, if there is no change in temperature and amount of gas?
When 3.00 g KNO3 are dissolved in 50 g glycerol, the freezing point changes from 17.8°C to 13.6°C. What is the freezing point depression constant (Kf ) for glycerol.
When 1.00 L of water from the surface of the Dead Sea is evaporated, 179 g of MgCl2 is recovered. What is the molarity of MgCl2 in the original sample
The vapor pressure of ethanol at 34.7 degrees Celsius is 100mmgh, and the heat of vaporization of ehanol is 38.6 kj/ mol. What is the vapor pressure of ethanol in mm Hg at 65.0 degree celcius
Compute the activation energy for this reaction when The half-lives were found to be 161 min at 199 Celsius and 12.5 min at 230 celsius? The isomerization of methyl isocynide follows first order kinetics.
What is the percent change in the volume of a balloon if the air inside it is cooled from 67C to 47C?
1 tap water contains dissolved oxygen gas o2aq. adding heat to tap water causes the dissolved oxygen to leave.
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