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Assume the eccentric professor has a daily special request for her coffee. She likes to have the 250.0 mL of coffee frozen at -15.0°C overnight and then want it heated to 95°C when she gets there in the morning. (?Hfusion = 6.02 kJ/mol; ?Hvaporization = 40.67 kJ/mol; Csolid = 33.1 J/(molx°C); Cliquid = 75.4 J/(molx°C); Cgas = 33.1 J/(mol x °C) Boiling point = 100°C; Melting point = 0°C) How much heat energy is required to heat the coffee as per the special request
While 1.22 g of a white solid, supposed of being pure cocaine, a molecular compound, is dissolved in 15.60 g of C6H6 the freezing point is lowered by 1.32 ¬0C. Compute the molar mass of the solid. Kf value for benzene = 5.12C/m.
The lamps worked by dripping water onto calcium carbide that generated acetylene gas (H2C2) that was burned. If the reaction is CaC2 + 2H2O H2C2 + Ca(OH)2, how many liters of acetylene gas at 1.00 atm pressure and 0.00 °C are produced from 75.0 gr..
Benzene (C6H6) is a trace component of gasoline. What is the mole ratio of benzene to n-octane in the vapor above a solution of 35.0% benzene and 65.0% n-octane by mass at 25 degrees C
What is the pH at the equivalence point when 0.0300 M NaF is titrated with 0.0610 M HClO4. (pKa = 3.17.)
Acid-catalyzed dehydration of an alcohol most closely resembles an E1 mechanism when secondary and tertiary alcohols are involved.
Compare this general form of this phase diagram with the interactive phase diagram for CO_2 and classify points a through g on the phase diagram according to the number of phases present at each point.
When a 0.0200 mol sample of SO3 is introduced into an evacuated 1.67 L vessel at 900K, 0.0132 mol SO3 is found to be present at equilibrium. What is the value of Kp for the dissociation of SO3 at this temperature?
Give the balanced thermochemical equation for the following reactions. show the correct physical state in each equation.
What is the minimum uncertainty in the position of an electron, given that we know nothing about its speed except that it is less than the speed of light?
One mole of an ideal gas with Cv,m = 3R/2 initially at 325K and 1.5*10^5 Pa undergoes a reversible adiabatic compression. At the end of the process, the pressure is 2.50 * 10^6 Pa.
Show that wave function(x)=cos(npix/L+pi) is a solution to the schrodinger equation for a particle in a box with infinite potential at x=0 and x=l where n is an integer. Normalize the function. Test whether these wavefunctions are orthogonal for d..
Polyethylene Density, (a) Which is the higher density of polyethylene, linear or branched? Select the choice with the best accompanying explanation.
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