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What is the [H3O+] of a buffer that consists of 0.154 M CH3CH2COONa and 0.645 M CH3CH2COOH. Ka of propanoic acid, CH3CH2COOH is 1.3 x 10-5.
ball is thrown up at 13.0 m/s near the edge of a 30.0-meter high cliff. The ball lands at the bottom of the cliff. How much time after being thrown does the ball take to land
A bucket of mass m is tied to a massless cable that is wrapped around the outer rim of a frictionless uniform pulley of radius R. what must be the moment of inertia of the pulley
In a second-order reaction the rate constant is 4.00 × 10?4 M?1 s?1. What is the concentration of reactant after 10 min if the initial concentration is 0.800 M
On being heated with potassium ethoxide in ethanol (70 degrees C), the deuterium-labeled alkyl bromide shown gave a mixture of 1-butene, cis-2-butene, and trans-2-butene. On the basis of your knowle
A spring whose spring constant is 750 N/m is compressed by 15 cm from. 10 kg ball. How high will the ball go in the air
a house is heated by 24 kq electric furnace using resistance heating if 9 J are used. How long was the furnace running in an acerage Jan day
electrons are ejected from a metallic surface with speeds up to 460000 m/s when light of wavelength 650 nm is used. find the work funtion
What is the final concentration (in M) of 15.4 mL iron(III) chloride solution with an initial concentration of 1.94 M which is diluted with 19.5 mL of solvent
Three parallel wires are parallel to the y-axis, and all are at z=0. The first is glued to the table top at x=0 and carries a current of 3 amps in the positive y direction. What is the initial accel
A long solid cylindrical wire of radius 0.01 meters carries a current whose density (current per unit area) is given by J=0.02r^2.
A long transmission wire carries an AC current given by I=400 sin(120pi*t). The transmission wire is parallel to the x-axis and located at y=0, z=20. What will be the induced voltage in the loop
Calculate the pH of a solution that results from mixing 19.5 mL of 0.145 M HCN(aq) with 22.1 mL of 0.108 M NaCN. The Ka value for HCN is 4.9 x 10-10.
A 10 kg block is allowed to slide down a frictional incline for a length of 10 m on an incline of 35. How long is the block in the air
Glycine has a standard entropy of 103.5J/K/mol and methylamine has standard entropy of 243.41 J/K/mol. How is this possible if glycine has a higher heat capacity.
a 90kg box is pushed by a horizontal force F at a constant speed up a ramp inclined at 28 degrees. Determine the magnitude of the applied force
In a fictitious lab experiment a class studied two acid base reactions and recorded the temperature change. class averages were reported 1) 30 ml of 3 molar hcl with 30 ml of 1.5 naoh change in temp
The allowed energies of a simple atom are 0.0 eV, 3.0 eV, and 4.0 eV. What is the minimum speed the electron could have after the collision
A 662 KeV photon from 137Cs is compton scattered at an angle 60, calculate the energy of the scattered photon
Considering the balanced chemical equation at the beginning of Section 4.2, why is it incorrect to say that if we burn 2 kg of octane, we would get 16 kg of CO2 as a product
A molecule of a mass m and velocity v strikes a wall and is reflected maintaing the same speed. What is the magnitude of the impulse imparted by the wall to the molecule
A 3kg object moving along the positive x direction with a speed of 10m/s exploeds into a 2kg and a 1kg fragments. what is the speed of the 2kg fragment?
What is the concentration of the ammonium ion (in M) in a solution which contains 51 g ammonium sulfide in 635 mL of solution
The elementary steps for the formation of nitrogen and water from nitric oxide and hydrogen are given below. Identify any intermediates. 2 NO(g) ? N2O2(g) N2O2(g) + H2(g) ? N2O(g) + H2O(g) N2O(g) +
In frame S, event B occurs 2 microseconds after event A and event A occurs at the origion whereas event B on the x-axis at x=3.3km. How fast must an observer be traveling along the +x axis