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At 20oC the vapor pressure of benzene(C6H6) is 75 torr, and that of toluene(C7H8) is 22 torr. Assume that benzene andtoluene form an ideal solution. What is the composition in molefractions of a solution that has a vapor pressure of 33 torr at 20oC?
The original volume (before the .406 mole C(g) begins to decompose) is 10.00L. What is the volume in the cylinder at equilibrium?
A biochemist studying the break down of insecticide DDT finds that it decomposes by a first-order reaction w/ a half-life of 12 years. How long does it take DDT in the soil sample to decompose from 2.40 x10^2ppbm to 10. ppbm (parts per billion by ..
A pound of coffee beans yields 53 cups of coffee (4 cups = 1 ). How many milliliters of coffee can be obtained from 1 of coffee beans?
If 26.0 g of ammonia gas has a temperature of -6.70 C and a pressure of 535mmHg , what is its volume
What is the smallest number of packages of buns, packages of patties, and jars of pickles, respectively? Express your answer as three integers separated by commas.
(Calculate using the given masses.) lighter isotope amu heavier isotope amu (c) Determine the average molecular mass of a Br2 molecule. amu (d) Determine the average atomic mass of a bromine atom. amu (e) Calculate the abundances of the two isotop..
Calcium carbide reacts with water to form acetylene and calcium hydroxide. From the following enthalpy data calculate Delta Hf for CaC2
Small helium-neon lasers emit 2.94 mJ/s of light at 634 nm. How many photons does such a laser emit in one minute?
If the initial concentration of cyclopropane is 0.150 M, what will the concentration of cyclopropane be after 22.0 hours? b) What is the half-life for the conversion process?
What is the pH at the equivalence point when 30.0 mL of 0.20 M HCl are titrated with 0.45 M NaOH at T = 298 K? Kw = 1.00 x 10-14.
Radical chlorination of pentane is a poor way to prepare 1-chloropentane but radical chlorination of a neopentane, (CH3)4C, is a good way to prepare neopentyl chloride
If 5.78 mol of ethane (C2H6) undergo combustion according to the unbalanced equation C2H6 + O2 = CO2 + H2O how much oxygen is required?
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