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A certain first-order reaction has a rate constant of at 25 degrees celsius . If the reaction rate doubles when the temperature is increased to 35 degrees celsius, what is the activation energy for this reaction in kJ/mol?
The final partial pressure of NOBr was 2.5 atm after the following equilibrium was established: 2NOBr(g) 2NO(g) + Br2(g). What is the value of Kp
Three isotopes of argon occur in nature - 36Ar, 38Ar, 40Ar. Calculate the average atomic mass of argon to two decimal places, given the following relative atomic masses and the abundances of each of the isotopes: argon
Why is the density of an ethanol/water mixture dependant on temperature? and how would the density of the ethanol/water change IF the temperature was increased and decreased
Given that an atom of a semiconductor has a diameter of 3.12 , what is the maximum number of moles that fit in the channel of a processor chip that is 63.5 long, 84.1 , wide and 465 thick? Assume that the atoms stack in a simple cubic arrangement.
A student performs a series of calorimetry experiments. She determines the calorimeter constant (Ccal) for her coffee cup calorimeter. She pours a 50.0 mL sample of water at 345 K into the calorimeter containing a 50.0 mL sample of water at 298 K.
Aluminum foil used for storing food weighs about 0.3g/in2. How many atoms are contained in one square inch of aluminum foil
How can you distinguish chemically between starch and three other carbohydrates (sucrose, glucose, & lactose)? What would you expect to observe when adding one drop of iodine-potassium iodine reagent to each of the four carbohydrates?
Assume every breath a person took is 0.5L of air, figure out how many grams of Oxygen you consume at every breath. Now assume that you breathe 30 times per second, figure out how long it took for you to consume all the oxygen in a sealed room of 1..
Determine the rate law and the value of k for the following reaction using the data provided
The standard heats of formation at 25 degrees celsius for NO(g) , O3(g) and NO2 (g) are 21.57, 34.1, and 7.93 kcal/mol respectively. What is the value for change direction for
without special correlation. What is the range width of the actual number of people present at the Station at any given moment? (For concreteness, assume the fluctuations do not exceed one sigma)
If 46.1 g Zn at 18.0 C is placed in 80.0 g H2O at 75.0 C, what is the final temperature of the mixture. The specific heat capacities of zinc and water are 0.388 J/g·K and 4.184 J/g·K, respectively.
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