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The wavelengths of the sodium doublet can be accurately measured despite the fact that they are very short. The IUPAC standard for the meter is, in fact, based on the wavelength of a particular line
A small object of mass 0.0150kg & a charge of 3.1 uC hangs fromthe ceiling by a thread. determine the tension in the thread
Given the reaction at a certain temperature: 2 HI <--> H2 + I2. at equilibrium, the partial pressure of HI is 1.8 x 10^ -3 atm, and the partial pressures for H2 and I2 are 0.10 atm each.
In Mexico, a courageous diver runs horizontally off the edge of a sea side cliff 48.8 m above the sea (about six stories high). Calculate her speed and direction angle of her velocity as she hits the
The lattice energies of FeCl3, FeCl2, and Fe2O3 are (in no particular order) -2631 kJ/mol, -5339 kJ/mol, and -14,774 kJ/mol. Match the appropriate formula to each lattice energy.
Joe pushes down the length of the handle of a 12.6 kg lawn spreader. What force must Joe apply to the handle
Calculate velocity of electron in first Bohr orbit of hydrogen atom (Given r = a0). Find de-Broglie wavelength of the electron in first Bohr orbit
After catching the ball, Sarah throws it back to Julie. The ball leaves Sarah's hand a distance 1.5 meters above the ground, What is the speed of the ball when it leaves Sarah's hand
An oversimpliefied model of the hydrogen atom has the electron orbiting the nucleus's proton at a distance of approximately 5.29x10^-11 m. how much force is needed to keep the electron in a circular
Draw the organic product(s) of the reaction of p-methylbenzoic acid with aqueous sodium hydroxide
A high driver of mass 65.0 kg steps off a board 10.0 m above the water and falls vertical to the water, starting at rest. what average upward force did the water exert on her
Methane is burned in a Laboratory Bunsen burner to give CO2 and water vapor. Methane gas is supplied to the burner at the rate of 5.0 L/ min ( at temperature of 28° C and a pressure of 773 mm Hg
A softball pitcher throws a ball straight upward as hard as she can. According to your stopwatch, What is the maximum height reached by the ball
What is the pH of a solution prepared by mixing 100 mL of 0.020 M Ca(OH)2 with 50 mL of 0.100 M NaOH? assume that the volumes are additive.
A 64-kg man standing on a scale in an elevator notes that the elevator rises, the scale reads 827 N. What is the acceleration of the elevator
Derive the activation energy for a reaction that proceeds 2 times faster when the temperature is raised from 20 C to 30 C. (show all work)
You are to drive to an interview in another town, at a distance of 200 km along a straight road from your home.The interview is at 9:15 A.M. Calculate your average speed for the entire trip
The mass of an electron is 9.11\times 10^{-31}~\rm kg. If the de Broglie wavelength for an electron in a hydrogen atom is 3.31\times 10^{-10}~\rm m, how fast is the electron moving relative to the s
A wire 28.0 cm long lies along the z-axis and carries a current of 8.50 A in the +z-direction. find the magnitude of the net magnetic force on the wire
Calculate the number of moles containing each of the following. Express your answer to three significant figures and include the appropriate units. A.) 1.42×1022 atoms of sodium
A stone is thrown outward from the top of a 59.4m high cliff with an upward velocity component of 19.5 m/s. How long is the stone in the air
A chloroform-ethanol solution at 35 oC with ?ethanol=0.200 in the liquid phase has a vapor pressure of 304.2 torr and a vapor composition of Yethanol= 0.138. Calculate the activity and activity coef
A ball is thrown horizontally from the top of a 20-m high hill. It strikes the ground at an angle of 45 degrees. With what speed was it thrown
Write the correct equation for the oxidation of zinc in 0.1 M hydrochloric acid. (WITH EXPLANATION PLEASE)