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Estimate the mass of the Martian atmosphere given the following information: the mean radius of Mars is R = 3386 km, the acceleration of gravity is g = 3.71 m/s2, and the atmospheric pressure at th
Explain how this photochemical isomerization allows the production of the thermodynamically less stable cis isomer. in other words, why is the trans isomer exclusivley converted to the cis isomer du
The haloform reaction using I2 and NaOH is referred to as the " iodofom" test for methyl ketones. the test also gives positive results for the compounds containing the -CH(OH)CH3 group.
A sample of water is to be analyzed for solids content. Ten liters (10 L) of water are passed through a filter initially weighing 15 g. After drying at 105oC, the filter plus residual weighs 43 g. T
Vinyl chloride (C2H3Cl) is a confirmed carcinogen that is sometimes found in drinking water and in the air we breathe. If vinyl chloride is present in air at a level of 80 ppb, what is the mass con
Consider the system introduced in example 3.B.2 (p. 97) in which a 2 L sealed jar, half filled with water and half filled with air, contains 10^-3 mol of toluene.
Solid chromium (III) hydroxide (Cr(OH)3) is added to pure water so that at equilibrium some solid remains undissolved.
What is the masss concentration of water vapor in the atmosphere at 25 degrees celcius when the realtive humidity is 60% and the saturation vapor pressure is 2800Pa?
Combustion of 6.51 mg of a compound gave 20.47 mg of CO2 and 8.36 mg of H2O. The compound has a molecular weight of 84g/mol. Calculate the percentage composition, empirical formula and molecular fo
Explain why the standard cell potential for a cell made using Cu/Cu2+ in both half cells is zero. Explain how it is possible to make a cell with Cu/Cu2+ in both half cells with Ecell not equal to z
How do you calculate the pH and pOH of an aqueous ammonia solution that has an OH - concentration of 1.9 x 10 -3 ? What is the concentration of the Ammonium ion?
Suppose you had a detection device that could count every decay from a radioactive sample of plutonium-239 (t1/2 is 24000 yr). How many counts per second would you obtain from a sample containing 0
Given that the E(o) for Cu+ is 0.521V and the E(o) for Fe(2+) is -.440V, determine the cell potential for the reaction and state wether or not the reaction is spontaneous.
You add 7ml of 6M NaoH to a flask and diluted with water to a final volume of 400ml with water. Neutralization required 21.45ml of the base solution when titrating 20.00ml of a 1.005 HCl solution.
Explain the formation of line spectrum in the Balmer series of hydrogen atom. If the emitted photon has a wavelength of 434nm, determine the transition of electron that occurs.
Methyl Orange is an acid-base indicator. In dilute solution at pH greater than 4.4, it is yellow. At pH = 3.2 the solution appears red.
Diazonium salts couple with phenols in slightly alkaline solution. What effect does the pH of the solution have on the reactivity of the phenol?
Write a suitable mechanism for the cleavage of butyl isopropyl ether with HI at 100 degrees C to form exclusively isopropyl alcohol and 1-iodobutane. Explain why butyl alcohol and isopropyl iodide
Enough cadmium(II) chloride is added to make Cd2+ 0.0013 M. What is the pH of the resulting solution? What percentage of the original hydroxide ion is left in solution?
Calculate the molar concentration of ethanol in an aqueous solution that contains 2.30g of C2H5OH in 3.50L solution.
To test the effectiveness of a gunpowder mixture, 1 gram was exploded under controlled STP conditions and the reaction chamber was found to expand to 310 cm3.
An unknown gas effuses at a rate that is only 0.468 times that of O2 at the same temperature. What is the molar mass of the unknown gas?
Diethyl ether has a vapor pressure of 400.0 torr at 18°C. When a sample of benzoic acid is dissolved in ether, the vapor pressure of the solution is 342 torr. What is the mole fraction of benzo
Dimethylglyoxime, DMG, is an organic compound used to test for aqueous nickel(II) ions. A solution prepared by dissolving 65.0 g of DMG in 375 g of ethanol boils at 80.3°C. What is the molar mas
Calculate the freezing point of a solution made by dissolving 3.50 g of potassium chloride (74.55 g/mol) in 100.0 g of water. Assume ideal behavior for the solution; Kf = 1.86°C/m.