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Calculate the standard cell potential for each of the following cells then write the overall reaction. (These rxns are given in reduction order for each half-cell.)
8g of helium at an initial temperature of 280Kinteracts thermally with 7.0g of oxygen at an initial temperature of 550K What is the final thermal energy of each gas
We store fats as triacylglycerides and not free fatty acids. We do this because it would change our pH and the osmotic pressure of the adipose cells.
Scientists in a laboratory produce a sound wave in a simulated environment (air) with a velocity of 479 m/s. What is the temperature (in Kelvin) of the environment
The next 6 questions involve the calculation of concentrations of the molecular and ionic species in an aqueous solution that has an analytical composition of 0.060 M KH2PO4 + 0.460 M K2HPO4.
One possibility for a low-pollution automobile is for it to use energy stored in a heavy rotating flywheel. What is the angular velocity of the flywheel when it has a full "energy charge"
Two equal masses collide in space away from any gravitational object. Mass A is moving in a straight line at 45 m/s, Find the speeds of the two masses after the collision
A converging lens with a focal length of 31 cm is used to form an image on a screen that is 2.7 m to the right the lens. Where must the object be placed
A uniform solid sphere of mass 1.5 kg and diameter 30.0 cm starts from rest and rolls without slipping down a 35° incline that is 7.0 m long. Determine the angular speed of the sphere about its c
Explain the purpose of adding 6 M HCl to the aqueous layer with sodium benzoate. Draw the reaction between sodium benzoate and HCl.
A hollow ball is rolling along a horizontal surface at 3.2m/s when it encounters an upward incline. If it rolls without slipping up the incline
Draw the reaction between benzoic acid and NaOH and explain why it is neccessary to use 3M NaOH as the aqueous layer to better separate the benzoic acid.
Calculate the angular momentum of Jupiter due to its orbital motion about the Sun. In your calculation, use 7.780 1011 m as the average Jupiter-Sun distance and 3.740 108 s as the period of Jupite
Make a prediction on the solubility of benzoic acid and 9-fluorinone in the two solvents used in this experiment. (The two solvents were NaOH and 6 M HCl)
In a particular x-ray tube, an electron approaches the target moving at 1.10 108 m/s. It slows down on being deflected by a nucleus of the target, compute the final speed of the electron
When the concentrations of CH3Br and NaOH are both 0.165 M, the rate of the reaction is 0.0050 M/s. (c) What is the rate of the reaction if the concentrations of CH3Br and NaOH are both increased by a
Suppose you are myopic (nearsighted). You can clearly focus on objects that are as far away as 50.2 cm away. What would be the refractive power (in diopters - do not enter units) for your prescription
A student made an acetic/acetate buffer by mixing 4.665 g of sodium acetate into 600.00 mL of a 0.0242 M acetic acid solution. What would the pH of the solution be as the result of the addition of 0
How do I know what the theoretical size is? I can make an estimate using the gel electrophoresis and compare the intensity of my pcr band with my ladder to make an estimation but how do I know the t
Which of the following species are amphiprotic in aqueous solution? For such a species, write one equation showing it acting as an acid, and another equation showing it acting as a base. OH¯, N
What are the resonance structures and intermediates in the formation of bromoacetanilide from the reaction of acetanilide and bromine liquid with acetic acid
A spherical mirror has a focal length of -14 cm. Where is the mirror's image for an object which is at a distance of 30 cm? Draw the ray diagram for this set up
What is the composition of the vapor of a pentane-hexane solution that has a vapor pressure of 357 Torr at 25C vapor pressures at 25 C= pure pentane is equal to 511 torr, pure hexane equals 150 torr.
A parallel-plate capacitor has square plates 20 cm on a side and 0.50 cm apart. what is the displacement current in the capacitor
Calculate the molarity of the resulting solution if 0.126 grams of Hydrogen ion [H+] is dissolved in 250 mL of distilled water.