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Calculate the energy in kJ/mol of a mol of photons in the gamma ray region of the electromagnetic spectrum that has a wavelength of 4.13 pm. Express answer in scientific notation.
What effects does MnO2 catalyst have on the rate of evolution of O2 gas? Write a balanced equation for the decomposition of H2O2.
The pKa of the acid function at the 2-position is approximately 2, whereas that at the 1-position is about 3. Which of the two is the more acidic and why?
An Olympic long jumper leaves the ground at an angle of 16.8 ° and travels through the air for a horizontal distance of 6.45 m before landing. What is the takeoff speed of the jumper?
in one experiment, 0.3030 g of erythrosin b (M = 879.9 g/mol) was added to enough water to make 100.0 mL of solution A. 5.00 mL of solution A was added to enough water to make 100.0 mL of solution B
Let the x axis be parallel to the ground, the +y direction be vertically upward, and take as the origin the point on the ground directly below the top of the ramp. (a) How high above the ground is t
Several compounds have the molecular formula C3H6O2. Give a structural formula for each of these compounds and name them.
For the reaction, A = B + C, the rate law is k[A]. If it takes 80.0 seconds for 70.0% of a 10.0 gram sample of A to be transformed into products, what is the value of the rate constant?
A football place kicker kicks a football from point 36 meter from the goal posts with an initial launch speed of 20m/s at an angle 53 degrees from the orizontal.The crossbar is 3.05 meters high. By
sulfur trioxide is made from the reaction of sulfur dioxide and oxygen. How many grams of SO3 can be made from the reaction of 3.00 grams SO2 with 2.02 grams O2.
What does this indicate about the relative size of the crystal field splitting for the water ligand compared to the ethylenediamine ligand? And how do you know?
A cab driver picks up a customer and delivers her 3.30 km away, driving a straight route. The driver accelerates to the speed limit and, upon reaching it, begins to decelerate immediately. The magni
Consider the titration of 84.0 mL of 0.148 M Ba(OH)2 by 0.592 M HCl. Calculate the pH of the resulting solution after the following volumes of HCl have been added. a)0.0 mL b)19.0 mL c)31.0 mL d) 4
Find the molecular formula of a compuond with percentage composition 26.7% P, 12.1% N, and 61.2% Cl and a molecular mass of 695 u.
What volume of a 0.160 M KOH solution would have to be added to 550.0 mL of the acidic solution to neutralize completely all of the acid?
A satellites are placed in a circular orbit that is 2.15 × 107 m above the surface of the earth. What is the magnitude of the acceleration due to gravity at this distance?
Assuming that the reaction is at equilibrium, what effect do the following changes have on the equilibrium position? (a) addition of co2 (b) addition of heat (c) decrease in the pressure.
A bowling ball (mass = 7.8 kg, radius = 0.11 m) and a billiard ball (mass = 0.38 kg, radius = 0.028 m) may each be treated as uniform spheres. What is the magnitude of the maximum gravitational forc
One method of commercially removing the skins from potatoes is to soak them in a 3 to 6 M solution of sodium hydroxide for a short time. When the potatoes are removed from this solution, the skins a
If a 2.7 reaction vessel initially contains 725 of cyclopropane at 485 , how long will it take for the partial pressure of cylclopropane to drop to below 105?
Three equal point charges, each with a charge of 2.00 mu C, are placed at the corners of an equilateral triangle whose sides have a length of 0.650 m. What is the potential energy of the system? (Ta
A 68-mg sample of a radioactive nuclide is administered to a patient to obtain an image of her thyroid. If the nuclide has a half-life of 12hours, how much of the nuclide remains in the patient aft
Write a brief explanation of what assumption is made in order to determine the molecular weight of your unknown solute when it is dissolved in cyclohexane.
Considering your answers to parts a, b, and c, what conclusions can you draw concerning the structures of species containing the same number of atoms and the same number of valence electrons?
A baseball thrown at an angle of 55.0^circ above the horizontal strikes a building 18.0 {rm m} away at a point 8.00 {rm m} above the point from which it is thrown. Ignore air resistance. Find the ma