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A reaction has a first order rate constant of 4.31x10-5 s-1 at 25oC and 0.00111 s-1 at 65oC. What is the value of the rate constant at 43oC
A catalyst decreases the activation energy of a given reaction by exactly 15 kJ/mol. By what factor does the reaction rate increase at 25oC when the catalyst is used. Assume that the Arrhenius pre-
What is the value of the reaction quotient (Qc ) for the reaction below if a 2.75-L flask contains 0.0282 mol NO2(g) and 0.612 mol N2O4(g) at 25°C
Chlorination via radical halogenation is a very unselective process and can lead to the formation of all three of the below products. Estimate the relative percentages of each product that will be f
By what percentage does a dilute aqueous solution expand when heated from 15 degrees to 25 degrees C? If a 0.5000M solution is prepared at 15 degrees C, what would molarity be at 25 degrees C?
Determine the pH of a solution with .12M of sodium acetate at 25 degrees C. Ka=1.8x10^-5
In a certain industrial process involving a heterogenous catalyst, the volume of the catalyst (in the shape of a sphere) is 10.0cm cubed. If teh sphere were broken down into eight spheres each havin
Having a really hard time with differentiating between endothermic and exothermic processes. A clearer explanation would be great. I don't understand what the difference is between a gas to a liquid
What is the difference between an Indicator electrode and a Reference electrode in a potentiometric titration
Calculate the pH at 25 degree C of .25 aqueous solution of phosphoric acid (H3PO4). (Ka1,Ka2, and Ka3 for H3PO4 are 7.5x10^-3, 6.25x10^-8 and 4.8X10^-13
Calculate the mass of Nitrogen (N2) that will react completely with 6.00g of Hydrogen (H2) to form Ammonia, via the reaction: N2+3H2=2NH3
The pH of an acidic solution is 5.71. Calculate the Ka for the monoprotic acid. The initial acid concentration is .010M of
Calculate the mass of Nitrogen (N2) that will react completely with 6.00g of Hydrogen (H2) to form Ammonia. Via the Reaction: N2+3H2=2NH3
Consider the electronic transition from n = 2 to n = 4 in a hydrogen atom and select the correct statement below.
Describe in detail how you would prepare a solution with a concentration near 0.10 M from a 0.650 stock solution. Calculate the final concentration of the diluted solution. It should be within 10% o
Nitrogen dioxide decomposes according to the reaction. kp=4.48X10^-13 at a given temperature. If 0.6 atm of NO2 is added to a container and allowed to come to equilibrium. What are the equilibrium p
At 25 C the density of water is 0.997 g/cm^3, whereas the density of ice at -10 C is 0.917 g/cm^3. if a plastic soft-drink bottle (volume=250mL) is filled with pure water capped and then frozen at -
the cancer drug cisplatin contains 65% platinum. if you have 1.53 g of compound, how many grams of platinum does this sample contain
what would be the concentration in the pond (and outlet stream) after 2 days? Inlet and outlet flows are both 280 m3 per day.
draw the structures of 1,1-dimethylcyclopropane and 1,2-dimethylcyclopropane. Is it possible to have 1,3-dimethylcyclopropane. Is this a correct name and different structure
Consider the electronic transition from n = 4 to n = 1 in a hydrogen atom, and select the correct statement below.
The photon emitted or absorbed during an electronic transition between n = 1 and n = 2 in a hydrogen atom has a wavelength in the visible portion of the electromagnetic spectrum and an energy that i
Analysis of an unknown solution produces absorbance values of: 0.45 @ lambda max for B 0.75 @ lambda max for A What is the molar concentration of the unknown
The Group 5A elements N,P,As have lower (less negative) electron affinities than most of the Group 4A or Group 6A elements because N,P,As have half-filled subshells.