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Without doing any calculations, determine the sign of Delta S_{{rm{sys}}} for each of the following chemical reactions.2KClO3(s) --> 2KCl(s) + 3O2(g)
The heat of combustion of cyclobutane is 650.3 kcal/mol. How much energy is released during the complete combustion of 450 grams of cyclobutane?
The rotten smell of a decaying animal carcass is partially due to a nitrogen-contained compounded called putrescine. Elemental analysis of putrescine showed that it consisted of 54.50% C, 13.73% H,
You are surprised by the fact that no 32P is found in the transcribed RNA! What does this result tell you about the mechanism of the new RNAP?
Calculate the change in entropy when 50kJ of energy is transferred reversibly and isothermally as heat to a large block of copper at (a) 0oC, (b) 70oC.
A typical ten-pound car wheel has a moment of inertia of about 0.35kgm^2. The wheel rotates about the axle at a constant angular speed making 40.0 full revolutions in a time interval of 5.00 .
In the presence of the antibiotic rifampicin, bacterial cells in culture are capable of sythesizing only short oligomers. At waht point of the transcription process must rifampicin exert its inhibi
A student decomposes water to produce hydrogen and oxygen. If the student begins with 34.7 g of water and collects 20.0 g of oxygen, what is her percent yield?
A loudspeaker of mass 15.0 is suspended a distance of = 2.20 below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of = 2.70.
If 1176 grams of is allowed to react with 704 grams of according to the following unbalanced equation, how many grams of are produced?
Give another means for carrying out the oxidation of Co(II) to Co(III) without using air.
In the preparation of the bromocobaloxime, air was utilized to oxidize Co(II) to Co(III). Explain in terms of crystal field theory why this oxidation proceeds readily.
a certain anesthetic contains 64.9 percent c 13.5 percent h and 21.6 o by mass. At 120 degree celcius and 750 mmHg, 1 L of the gaseous compound weighs 2.3g what is the molecular formula of the compo
A solution is made by dissolving 11.7 g of NaOH in approximately 450 mL of water in a volumetric flask. The solution becomes quite warm, but after it is allowed to return to room temperature, water
An electron moves with a horizontal velocity 3.0x 10^6m/s of as it enters a deflector inside a TV tube. The electron strikes the screen after traveling 17 cm horizontally and 40 cm vertically upward
Calculate Kc for the reaction at 686°C. If we add CO2 to increase its concentration to 0.50 mol/L, what will the concentrations of all the gases be when equilibrium is reestablished?
a sample of carbon dioxide occupies a 2.54 dm^3 container at STP. what is the volume of the gas at a pressure of 150.0kPa and a temperature of 26.0 C?
They want to dock, which means they have to arrive at the same position at the same time with zero velocity. a) What should the initial velocity of the second spacecraft be?
One mole of an ideal gas is sealed in a 22.4- L container at a pressure of 1.00 rm atm and a temperature of 273 K. The temperature is then increased to 305 K, but the container does not expand. What
Find the magnitude and direction of the force Fw. Express the direction as an angle with respect to due east.
Calculate the cell potential after the reaction has operated long enough for the [Cr2+] to have changed by 0.30 M.
Two blocks connected by a string and tied to a wall, with θ = 29°. The mass of the lower block is m = 1.2 kg; the mass of the upper block is 2.0 kg.(a) Find the tension in the string conne
A particle revolves in a horizontal circle of radius 3.40m . At a particular instant, its acceleration is 1.50m/s^2 , in a direction that makes an angle of 35.0 degrees to its direction of motion. D
Use the data to calculate the average number of moles of ascorbic acid present in the titrated samples? titration of 10.00 mL fruit juice with 2.00X10-3mol/L I2(aq)
What is the molarity of a solution that contains 27.0 of vitamin B1 hydrochloride (molar mass = 337 ) in 210 of solution?