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The standard enthalpies of combustion for ethanol and dimethyl ether are -1367kJ mol-1 and -1460kJ mol-1, respectively, at 298K. what is delta U at 298K for the purposes below:
dimethyl ether->ethanol
A certain second-order reaction (B--->products) has a rate constant of 2.00×10^-3 M^-1 s^-1 at 27 Celsius and an initial half-life of 214 s. What is the concentration of the reactant after one half-life
which of the following is NOT a vitamin that is used by cells to produce a cofactor requires by alpa-ketogluterate dehydrogenase
What is the pressure in the cell? The volume is reduced until the cell is essentially full of liquid n-butane with only a few bubbles of n-butane gas remaining. What is the pressure?
Consider the graph of Gsystem versus extent of reaction (such as Q). Which of the following represents an irreversible reaction
What is the molarity of an aqueous solution containing 75.3 g of glucose (C6H12O6, mol wt = 180 g/mole) in 35.5 mL of solution
A galvanic (voltaic) cell consists of an electrode composed of chromium in a 1.0M Chromium(II) ion solution and another electrode composed of silver in a 1.0M silver ion solution, connected by a salt bridge.
Construct the appropriate calibration curve as described in this lab and determine the %(W/W) of fluoride in the original toothpaste sample:
A piston has an external pressure of 11.0 bar . How much work has been done if the cylinder goes from a volume of 0.150 liters to 0.570 liters.
calculate the energy lost when 75.0 g of water cools from 86.4 degrees celcius to 2.1 degrees celcius
Does anyone know the balanced equation piperonaldehyde (C8H6O3)+ acetophenone (C8H8O)= 3,4-methylenedioxychalcone(C16H12O3)
Give the symbol of the element in the fifth period of the periodic table with five valence electrons, Give the symbol of the element in the fourth period of the periodic table with four 4p electrons
One pound of Sulfur combines with one pound of oxygen to produce a gas. What is the percent by weight composition of this gas?
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