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A solution containing 8.3 g of a nonvolatile nondissociating substance dissolved in 119.5 g of chloroform, CHCl3, and the solution has a vapor pressure of 511 torr. The vapor pressure of pure chloroform is 526 torr. Calculate the molar mass of the solute.
an aerosol spray can with a volume of 456 ml contains 3.09 g of propane gas c3h8 as a propellant. if the can is at
A peanut is burned in a calorimeter made from an aluminum can. The peanut weighed 0.780 g before combustin and .054 g after combustion. The temperature change of aluminum can filled with 200 ml of water was 15.3. (Density of water = 1.00g/C)
If a salty crude sample was analyzed to have 110.6ppm salt. Calculate the pounds of sait per 1000 bbls of crude
if the density of water at 25.2 degree celcius is 0.997962 g/cm^3, what is the volume of liquid in mL whose mass is 20.762 g?
an unavoidable side reaction of alkyl halides with active metals which lowers the yield of grignard reagents is called
What mass of sucrose should be combined with 493 g of water to make a solution with an osmotic pressure of 9.00 atm at 320 K? (Assume the density of the solution to be equal to the density of the solvent.)
The standard change in enthalpy at 142oC for the following two reactions are, respectively, -23.44 and 94.67 kJ. [1] 4 X(s) + 3 O2(g) + 2 H2O(l) ? 4 HXO2(g)
A gas expands and does P-V work on the surroundings equal to 327 J. At the same time, it absorbs 121 J of heat from the surroundings. Calculate the change in energy of the gas.
before addition of any HCl (b) after addition of 25.0 mL of HCl (c) after addition of 50.0 mL of HCl (d) after addition of 100.0 mL of HCl
how many grams of sodium lactate should be added to 1.00 l of 0.150 lactic acid or to form a buffer solution with
For the following reaction, calculate the concentration of C(aq) at equilibrium when .135M B solution is alllowed to react with A. A(liquid) + B(aq) ---> C(aq) + D(aq)
A sample of bananas in water is found to have a [H3O1+] = 2.51 x 10-5M. What is the pH of the solution? Are bananas acidic (A), basic (B), or neutral (N)
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