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What must be the velocity, in meters per second, of a beam of electrons if they are to display a de Broglie wavelength of 83.7 m
Calculate the concentration of NO3- ion remaining in solution.
A reaction 3A2+ + 2B --> 3A + 2B3+ is used to make a battery. The standard Gibbs free energy change for the given reaction is -690 kJ. What is the standard potential (E ) for the battery.
What is the H+ concentration of an aqueous solution with a pOH= 4.38 at 25 degrees celcius.
The "air bags" in automobiles contain sodium azide, NaN3, which decomposes when activated by an electronic igniter to produce nitrogen gas that fills the bag.
What is the rate of entropy generation within the tank? 3.) If we duplicated the stream conditions (temperatures, pressures, and flowrates) with an internally reversible process, what is the maximum rate at which work could be obtained?
a mixture consists of 35% He(g) and 65% N2(g) by mass. If it exerts a total pressure of 2.15 atm, what is the partial pressure of helium
A sunscreen preparation with a density of 2.82 g/mL contains 3.55% by mass zinc(II) oxide. Each tube is filled with 185.0 mL of sunscreen. If you are the manufacturer and use 5.00 lb of zinc(II) oxide.
A gaseous sample of this element is bombarded by photons of various energies (in these same units). Match each photon to the result of its absorption
How many moles of KMnO4 are present in 25.0 mL of a 0.0900 M solution?
The electrode of a pH meter is placed in a sample of urine and a reading of 7.9 is obtained. Is the sample acidic basic, or neutral? What is the concentration of H3O+ in the urine sample?
If 2.5 mol of ethylene oxide is decomposed at 93 degrees celcius what will be the final temperature of the products? The heat capacity of the products is 110.13J/mol C
compare the stabilities of each of the four conjugate bases that would be formed from the doprotonation of the four different OH groups and determine which of hte OH is most acidic.
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