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Compute the molar mass that would be obtained under the subsequent conditions. The unknown is methyl propyl ether (CH3OC3H7) which has a vapor pressure of 375.2torr at room temperature, 20 degrees celcius. The volume of the flask is 135 ml, the temperature of the bath is 100 degrees Celsius, as well as atmospheric pressure is 760torr. The average molar mass of air is 29.0 g/mol.
The water level in a graduated cylinder initially at 211 rises to 282 after a piece of lead is submerged. What is the mass in grams of the lead.
Suppose that you developed your own new temperature scale, denoted oN. You chose 30.0oN as the temperature of freezing water and 280oN as the temperature of boiling water at 1.0 atm pressure.
Calculate the pH for each of the following cases in the titration of 50.0 mL of 0.100 M HCLO with 0.100 M KOH. The ionization constant for HCIO is 4.0 x 10^-8 a) after addition of 50.0 ml of KOH
body scanners used in hospitals operate with 400 radiofrequency energy.How much energy does this correspond to in kilojoules per mole?
considering the given equation as. cac2s2h2ol c2h2gcaoh2aq nbspin which acetylene gas c2h2 is produced a. determine
A solution of CH2Cl2 in the solvent (C2H5)2O has a mole fraction of methylene chloride of 0.302. What mass (g) of the solution must be taken if 1050 g of CH2Cl2 is needed
Using the weak acid that you were assigned in this experiment and .100M NaOh, describe exactly (show calculations) how you would prepare 100.0mL of a buffer at pH = 5.50
The two occuring isotopes of gallium-69 and gallium-71,which are found in the ratio of 3:2. Determine the atomic mass of gallium.
A reaction is begun with a reaction mixture containing the following: [dye] = 1.0 x 10-4 M [bleach] = 0.10 M When [dye] = 8.0 x 10-5 M the rate is determined to be 3.74 x 10-7 M/min. When [dye] = 4.0 x 10-5 M the rate is determined to be 1.71 10-7..
At what pressure does the mean free path of argon at 25 C become comparable to the diameter of a spherical vessel of volume 1.0 dm^3 that contains it? Take ? =0.36nm^2.
What kinetic energy must the electrons have in order to resolve a protein molecule that is 3.80 nm in diameter? Take the mass of an electron to be 9.11× 10-31 kg.
Please give a balanced equation with a stepwise mechanism for the preparation of 3,4-methylenedioxychalcone from piperonaldehyde and acetophenone (with ethanol)
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