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Determine the dissociation constants for the following acids. Express the answers in proper scientific notation where appropriate
A simple circuit consists of a battery connected to a lightbulb. A current of 0.243 A runs for 64.5 min, What is the voltage of the battery
A human can be electrocuted if a current of 0.053 A passes near the heart. If a human is considered to be a resistor in a circuit with a resistance of 2039 ?,
If 3.7 g of butanoic acid, C4H8O2, is dissolved in enough water to make 1.0 L of solution, what is the resulting pH
A wheel consists of 20 thin spokes, each with mass 0.070kg , attached to a rim of mass 4.4kg and radius 0.85m. Find its rotational inertia
If you wanted to prepare a solution of CO in water at 25 in which the CO concentration was 2.1 mM , what pressure of CO would you need to use
A plank 2.00 cm thick and 15.1 cm wide is firmly attached to the railing of a ship by clamps so that the rest of the board extends 2.00 m horizontally over the sea below. find the shear modulus of t
Despite its apparent unsaturation, no hydrogen was absorbed on catalytic reduction over a Pd/C catalyst. On treatment of A with dilute H2SO4, dehydration occurred and an optically inactive alkene B,
Three sheets of plastic have unknown indices of refraction. Sheet 1 is placed on top of sheet 2, and a laser beam is directed onto the sheets from above, what is the expected angle of refraction in
On a 7.2 m length of string, you count 5 crests and 4 troughs. What is the wavelength of the waves on the string
At high temperatures phosgene (COCl2) decomposes to give carbon monoxide CO and Cl2. In a typical experiment, 0.631 g of COCl2 is injected into a flask of volume 472 cc. When equilibrium is establis
A hydrogen atom in the ground state absorbs a 20 eV photon. What is the speed of the liberated electron
A compound contains only C, H, and O. To analyze the compound, you determine its empirical formula by analysis for C and H, and its molar mass by freezing point depression. (a) What is the empirical
A laser beam strikes one end of a slab of material, Determine the number of internal reflections of the beam before it emerges from the opposite end of the slab
If Wave B's amplitude is instead -13.4 mm, what is the amplitude of the wave pulse formed while they are interfering
Nitric acid is often manufactured from the atmospheric gases nitrogen and oxygen, plus hydrogen prepared by reforming of natural gas, in a two-step process.
The activation energy of a certain reaction if 65.7kJ/mol. How many times faster will the reaction occur at 50 degrees Celsius than at 0 degrees Celsius? State the assumptions you need to make in or
Your car's fan belt turns a pulley at 3.15rev/s . When you step on the gas for 1.60s , the rate increases steadily to 5.95rev/s . What's the pulley's angular acceleration
A sample of an unknown material appears to weigh 255 N in air and 195 N when immersed in alcohol of specific gravity 0.700. What is the volume of the material
The emerging gas is collected in a 5.00L flask and is found to contain 8.62g of carbon monoxide, 2.60g of hydrogen gas, 43.0g of methane, and 48.4g of water vapor. Assuming that equilibrium has been
Suppose your 50.0 mm focal length camera lens is 53.5 mm away from the film in the camera. How far away is an object that is in focus
how many moles of NH4Cl are necessary to prevent the precipitation of magnesium hydroxide (neglect change in volume due to addition of NH4Cl)? The solubility product for Mg(OH)2 is 1.5× 10-11,
An electron passes through a point 3.75 cm from a long straight wire as it moves at 36.1% of the speed of light perpendicularly toward the wire. Find the magnitude of the electron\'s acceleration at
The Ksp of mag fluoride is 6.4x10 -9degree calculate the solubility (in g/l) of mag fluoride in water
Calculate the 1/2 life for the decomposition of co2 which is first orderwithnrespect to co2 at 1000degree k with k=1.8x10to-13degree sec