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If the initial concentration of AB is 0.210 M , and the reaction mixture initially contains no products, what are the concentrations of A and B after 70 s
Molecules act as tiny springs and have vibration energy and frequency. The frequency of CO molecule is 6.42 x 1013Hz. Calculate the spring constant using the effective mass
An electrochemical cell is constructed in which one half-cell contains AgN03 solution in contact with an Ag strip, and the other half-cell contains magnesium nitrate solution, Mg(N03h, in contact wi
A pulsed proton beam is fireat a target each last 45.0ns and there 3.00 X 10^9 protons in each pulse, What is the average pressure on the beam spot during the pulse if the protons are absorbed by the
A certain reaction with an activation energy of 195 K was run at 535K and again at 555 K What is the ratio of f at the higher temperature to f at the lower temperature
An isolated parallel plate capacitor contains charge Q = +10uC on its plates, correponding to a potential difference of 10V. What is the voltage between the two plates after the separation becomes 2d
Draw three non-equivalent Lewis structures for the nitrous N2O molecule. Show all non-zero formal charges. Which structure(s) is (are) the most important
The electron in a hydrogen atom occupies a 6p orbital. What is the longest wavelength of light that can be emitted by this atom? Give answer in nanometres, nm
xygen, contained in a 1.0-L vessel at 4.0atm, is transferred to a 5.0-L vessel containing only Argon, Ar, at 2.0atm. What is the final total pressure in the 5.0-L vessel? Assume that there is no cha
The groups in the periodic table are numbered 1 through 18. What are the group numbers of the groups for which the atoms are all diamagnetic in their group electronic states.
two point charges are on the y axis. A 3.50 uc charge is located at y=1.1cm, and a -2.16 uc charge at y=-1.4cm. find the total electric potential at origin in volts
In which of the following reactions would increasing pressure at constant temperature not change the concentrations of reactants and products, based on Le Ch telier's principle
A 20t space craft leaving the dock of a space stationmakes a 12s engine burn. find the final speed of the space craft with respect to the station
The angular position of a point on the rim of a rotating wheel is given by ? = 7.68t - 5.13t2 + 1.73t3, where ? is in radians and t is in seconds. find the angular velocities at the end of this time
The standard enthalpies of combustion for ethanol and dimethyl ether are -1367kJ mol-1 and -1460kJ mol-1, respectively, at 298K. what is delta U at 298K for the purposes below:
A meter stick is pivoted at its 50-cm mark but does not balance because of non uniformities in its material that cause its center of gravity to be displaced from its geometrical center. Find the mas
A 14.0-m uniform ladder weighing 510 N rests against a frictionless wall. The ladder makes a 63deg angle with the horizontal. what is the coeffecient of static friction between ladder and ground
A 6.4 cm diameter pipe gradually narrows to 4.0 cm. When water flows through this pipe at a certain rate, What is the volume rate of flow
a nitrile (RCN) is converted to what functional group when treated with LiAlH4 followed be an aqeous workup a carboxylic acid is converted to what functional group when treated with LAH followed by an
the lowest energy product formed in an aldehyde is treated with secondary amine in the presence of trace acidthe lowest energy product formed in an aldehyde is treated with secondary amine in the pr
A 6.5- kg block oscillates with an amplitude of 0.100 m on a light spring of constant k = 16.0 N/m. What is the maximum value of the block's velocity
The difference in the mercury levels in the two arms of the manometer was 11.8 cm. Atmospheric pressure was 783 mm Hg. The pressure of the argon in the container was __________ mm Hg.
An electron is accelerated through a potential difference of 100 V, Find the radius of the circular path in which it will travel
A closed-end manometer was attached to a vessel containing argon. The difference in the mercury levels in the two arms of the manometer was 11.8 cm. Atmospheric pressure was 783 mm Hg. The pressure