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Draw Fischer projection formulas for the products likely to be obtained from the bromination of (Z)-2-pentene with Br2/acetic acid. Identify the chiral centers with asterisks and label each center as R or S.
If 69. J of heat are applied to 20. g of aluminum, by how much will the temperature of the aluminum increase? (The specific heat capacity of Al (s) is 0.89 J/(g °C).)
Calculate the entropy change for vaporization of 18 g of H2O. The molar enthalpy of vaporization for water is 44 kJ/mol and the boiling point
Calculate the volume of glacial acetic acid (17.6M) and eight of sodium acetate (mm=82.03) that is required to make 102 mL of 0.2M buffer at ph 4.85. The Ka of acetic acid is 1.4*10^-5.
Estimates show that the total energy output of the sun is 5X10^26 J/s. What is the corresponding loss in Kg/s of the sun in scientific notation
A gas occupying 28 mL at standard conditions is heated to 13?C while the pressure is reduced to 0.84119 atm. What is the new volume occupied by the gas.
A gaseous reaction occurs at a constant pressure of 50.0 atm and releases 67.9kJ of heat. Before the reaction, the volume of the system was 8.80L . After the reaction, the volume of the system was 2.80L .Calculate the total internal energy change ..
In a bad sporangiospores and fungi, are found in bag-like structures. Ascospores are also found in bag-like structures, but are always present in even numbers. Why are these spore types not the same?
The density of chloroform, a widely used organic solvent, is 1.4832 at 20 . How many milliliters would you use if you wanted 119.0 of chloroform.
The Ksp for silver cyanide is 1.2x10^-8, the Ksp for zinc cyanide is 8.0x10^-12, and the Ksp for aluminum cyanide is 2.3x10^-21. What is the minimum cyanide concentration needed to precipitate each condition
The quantity of acetylene (HC+CH) in a gas mixture was measured by mass spectrometry, in which the signal for mass number 26 is proportional to the volume percent of acetylene. Gas Signal (mV) Blank containing no acetylene 0.2
What alkene (including cis and trans isomers) would be produced by the dehydration of the following alcohols? Where possible, predict the relative amounts of each product according to Zaitsev's rule. a. 3-pentanol b. 2-methyl-2-butanol c. 1-butano..
A mixture moistened with water and placed it in a desiccator (drying chamber) with silica gel to dry at 22C. the silica gel absorbed water vapor as the mixture dried.
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