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A first order reaction has a rate constant of 0.210 at 25 oC and 4.91 at 42 oC. Calculate the value of the activation energy in KILOJOULES (enter answer in E format to 3 significant figures. Remember - 2.41 would be 2.41E0)
Suppose that the microwave radiation has a wavelength of 12.4 . How many photons are required to heat 215 of coffee from 25.0 to 62.0 ? Assume that the coffee has the same density, 0.997 , and specific heat capacity, 4.184 , as water over this tem..
A 50.0g silver object and a 45.0 g gold object are both added to a 55.5 mL of water contained in a graduate cylinder. what is the new water level in the cylinder.
a gas is placed in a balloon with a volume of 3.0L at 35C and 800 torr. What would be the new volume for the gas if placed under STP
moles of an ideal gas in an initial state T1 = 300 K and P1 = 0.5 bar undergo an isothermal compression until the pressure of the system is four times the original pressure
Why is it necessary to first "process" the broccoli before preparing the test sample? What factors are affected that will adversely influence
Using A flow diagram, show the separation of a mixture containing p-bromoacetanilide, N-cyclopentyl-N-methyl-N-propylamine (N means the group is attached to the nitrogen of the amine) and m-nitrophenol.
Write the structural formula for each of the following compounds.
Write a balanced molecular equation and a net ionic equation for the reaction aluminum hydroxide with a solution of hydrobromic acid. Include the states of each species. a) balanced molecular equation b) net ionic equation
A piece of a newly synthesized material of mass 25.0 g at 80.0C is placed in a calorimeter containing 100.0 g of water at 20.0C. If the final temperature of the system is 24 0C
On heating 5.03 g of hydrated barium chloride, 4.23 g is left behind. What is the name of this hydrate?
30.0 mL of a 3.0 M KOH solution are diluted to 250.0 mL. What is the molarity of the diluted KOH solution? 3)what volume of 1.00 M NaOH is required to prepare 500.0 mL of 0.250 M NaOH? then explain how to prepare this solution.
Ultra-high-vacuum experiments are routinely performed at a total pressure of 1.0 x 10-10 torr. Calculate the mean free path of N2 molecules and the binary number of collisions, Z11, of N2 molecules (per liter per second) at 350 K under these condi..
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