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Carbon disulfide, CS2, has a vapor pressure of 300mgHG at 20C. Astoppered flask contains .10 mols of CS2 at 20C. What is themaximum volume the flask can have if equilibrium exists between liquid and vapor CS2?
for an alloy that consists of 90 at zn and 10 at cu what are the concentrations a of zn in weight percent and b of cu
When 1.150 grams of an unknown nonelectrolyte dissolves in 10.0 grams of water, the solution freezes at -2.16°C. What is the molecular weight of the unknown compound? Kf for water = 1.86°C/m.
the combustion of 45.0 of methane natural gas releases 2498 of heat energy. how much energy in kilocalories would
Calculate the expectation values of for a particle in the state n=3 in a one-dimensional box.
The standard free energy change associated with the dissolution of ammonium nitrate in water is -6.73 kJ/mol at 298.15 K. NH4NO3(s)->NH4NO3(aq) What is the equilibrium constant for the reaction. (R=8.314 J/K*mol)
85.50 mL of 0.0815 M sodium hydroxide is reacted with 8.15 g oxalic acid as shown in the reaction below. What mass of the excess reactant remains after the reaction is complete
Show that the ammonium ion NH4+, 1ppb(mole fraction) is equivalent to 0.56 ppb (mass fraction) or .74 ugm-3 at T=298 and 1 atm. Start by solving for mass concentration Note that mass fraction is related to mole fraction as
A gas under a pressure of 74 mmHg and at a temperature of 75C occupies a 500.0-L container. How many moles of gas are in the container?
How much energy in kilojoules is required to convert 260 mL of water at its boiling point from liquid to vapor?
a cylinder with a piston pressing down with a constant pressure is filled with 2.20 moles of a gas n1 and its volume is
Compute the molecular formula of CH 3 COOH the percent composition of acetic acid is 39.99% C and 6.73% H. The remainder of the compound is oxygen.(The molar mass of acetic acid is 60.06 g/mol.)
The rate of substitution of alkyl chlorides and alkyl bromides can be increased by adding a catalytic amount of sodium iodide. Explain
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