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A heat of fusion of dethyl ether ((CH3)2(CH2)2O) is 185.4 kJ/MOL. Calculate the change in entrophy when 72g of diethyl ether melts at -117.4 Celcius.
What is the freezing point of the solution. Melting point (CCl4): -22.92 C Melting point (C6H6): 5.5 C K(CCl4): 2.65 C/m K(C6h6): 3.92 C/m
Use the Henderson-Hasselbalch equation to calculate the pH of each solution: a solution that is 0.140 in propanoic acid and 0.125 in potassium propanoate.
if an athlete expends 1850KJ/h (kilojoules per hour), how long does he have to exercise to work off 1.0lb of body fat?
cs2l 3cl2 g --gt ccl4 ls2cl2l is the given equation in which carbon tetrachloride is a common commerical solvent . can
What is the molarity of a solution of 14.0 g NH4Br in enough H20 to make 150 ML of solution.
A reaction mechanism involving three steps is shown below. Identify all of the catalysts in the following mechanism.
Hospital X-ray generators emit X-rays with wavelength of about 15.0 nanometers (nm), where 1 nm= 10^-9 m. What is the energy of the X-rays
The standard voltage of the cell Ag(s) | AgBr(s) | Br (aq) || Ag +(aq) | Ag(s) is +0.73 V at 25 ?C. Calculate the Ksp for AgBr.
A 0.1036 g sample containing only BaCl2 and NaCl is dissolved in 50 mL of distilled water. Titration with 0.07916 M AgNO3 requires 19.46 mL to reach the endpoint. What is the % by wt. of NaCl in the sample
How many nucleotides are needed to code for a polypeptide with eleven amino acids
Analysis of corrosion mechanisms and preventative measures
For a certain process at 27°C, DG = +210.6 kJ and DH = -168.2 kJ. What is the entropy change for this process at this temperature? Express your answer in the form, DS = ____ J/K.
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