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The vapor pressure of ethanol is 400 mmHg at 63.5 degree celsius. Its molar heat of vaporization is 39.3 kJ/mol. What vapor pressure of ethanol, in mmHg, at 34.9 degree celsius
A cylindrical storage tank has a radius of 1.04 m. When filled to a height of 3.64 m, What is the density of the solvent
The bitter-tasting compound quinine is a component of tonic water and is used as a protection against malaria. It contains only C, H, N and O. When a sample of mass 0.487 g was burned, 1.321 g of ca
Calculate the at-rest earth pressure (po) exerted at the base of the wall and plot the wall pressure diagram and show the location on the wall where the resultant force Po acts.
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 det
Two identical diverging lenses are separated by 15 cm. The focal length of each lens is -8.0 cm. Determine the final image distance relative to the lens on the right
Attempting to recrystallize a compound but it won't dissolve in boiking hexanes and while it readily dissolves in boiling ethyl acetate, no crystals are formed upon cooling. What is the problem and
A three-step cycle is undergone by n moles of an ideal diatomic gas: (1) the temperature of the gas is increased from T_1 to T_2 at constant volume, compute the efficiency of the cycle in terms of T
You take 1 ml of your sample and dialyze it in 1000 ml of buffer. At the end of dialysis what is the concentration of (NH4)2SO4 in your sample. How could you further lower the (NH4)SO4 concentration
A space station is constructed in the shape of a hollow ring of mass 5.90 104 kg and radius 140 m. The station has 300 crew members (each with average mass 65kg), How much work is done to get the sp
Two 95.0W (120 V) lightbulbs are wired in series, then the combination is connected to a 120V supply. How much power is dissipated by each bulb
FOr the balanced equation shown below, how many moles of Fe3O4 will react with 1.02 moles of CO, to form how many moles of FeO
What is the magnitude of the maximum displacement from the equilibrium of the top of the building, What is the maximum velocity of the top of the building
If a force of 300N is exerted upon a 60 kg mass for 3 seconds, how much impulse does the mass experience
What is the percent-yield of H2 in the reaction below when an equimolar mixture of CH4 and CO2 with an initial total pressure of 20.0 atm reaches equilibrium at 1200. K, at which Kp = 3.548 x 106
The speed of light in polythene is 1.99 x 108 m/s. What is the index of refraction of polythene
A 200 g calorimeter contain 500 g of water at 21 degree Celsius. A 100g of ice at -20 degree Celsius is placed into the calorimeter. find the specific heat of the material of the calorimeter
What is the final concentration if 75.0ml of a 3.50M glucose solution is diluted to a volume of 400.0ml
Plane monochromatic waves with wavelength 550nm are incident normally on a plane transmission grating having 360slits/mm. Find the angle of deviation in the third order
calculate the attractive bonding forces between the different ions, (2) compare qualitative curves of bond energy vs. ion separation distance for the two compounds
Calculate the molar solubility of PbCl2 in a 0.20 M NaCl solution. The Ksp of PbCl2 = 1.7 x 10-5. Can any assumptions be made to simplify this calculation
A certain metal hydroxide, M(OH)2, contains 32.8oxygen by mass. What is the identity of the metal
What's the difference between a rotational and a circular motion and Why does vertically falling rain make slanted streaks on the side windows of a moving auto
A hydrocarbon is a compound that contains mostly carbon and hydrogen. Calculate the percent composition (by mass) of the following hydrocarbon
A 12 g bullet is fired horizontally into a 96 g wooden block initially at rest on a horizontal surface. estimate the speed of the bullet