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When the x coordinates of the atoms are equal, a magnetic field perpendicular to their motion is turned on so that the atoms collide head-on. What are (a) the magnitude and (b) the direction of the
A 0.521 M potassium hydroxide solution is titrated to the equivalence point by 15.27 mL of a 1.240 M phophoric acid solution.Q. what volume(in mL) of potassium hydroxide was titrated?
0.800 moles of an unknown mono basic weak base are added to1.70 L of water. The resulting solution has a pH of 9.500. What is the Ka of the conjugate acid of the unknown base? Assume no change i
A concave makeup mirror has a radius of curvature of 25cm. How close to the mirror should a young woman's nose be in order to see an image enlarged by three times? Draw a ray diagram to illustrate t
How many grams of NaCN would you need to dissolve in enough water to make exactly 425 mL of solution with apH of 10.00?
Which of the following metals would result in the greatest final temperature if 63.9 grams of each are heated to the same initial temperature and added to 51.1 mL of 29.0°C water?
Suppose a 50 kW radio station, operating at a frequency of 106.5 MHz, emits EM waves uniformly in all directions. a. What is the wavelength of the radio waves?
A sledge loaded with bricks has a total mass of 17.2 kg and is pulled at constant speed by a rope inclined at 19.3° above the horizontal. The sledge moves a distance of 21.0 m on a horizontal su
What is the enthalpy change for the reaction per mole of CsOH? Assume the density of the solutions are 1.00g/mland the specific heat capacities of the solutions are 4.2 J/g. K.
Three polarizers arranged in series are each oriented at 300 from the previous one. If an unpolarized light beam travels through the three polarizers and emerges with an intensity of 0.2 W/m2, what
Explain why the sample in an IR spectrophotometer is place dimmediately after the source of radiation and in UV-Vis is place dafter the monochromator.
Assuming the radius of earth to be 6.38 x 10^6, what is the magnitude of the resulting compressional force on earth?
What makes vibrational spectroscopy (DRIFTS/RAMAN) a better characterization tool than other spectroscopic techniques such as UV-Vis and fluore scence?
A 50-N net force acts horizontally on a 2-kg crate that starts from rest. When the force has been acting for 2 s the rate at which it is doing work is:
A computer is reading data from a rotating CD-ROM. At a point that is 0.038 m from the center of the disc, the centripetal acceleration is 112 m/s2. What is the centripetal acceleration at a point t
An inductor has a 58.2 O reactance at 60 Hz. What will be the maximum current if this inductor is connected to a 50 Hz source that produces a 175.1 V rms voltage? Answer in units of A.
A long air-core solenoid of 240 turns has a length 0.2 m and radius 2.0 cm. It carries a current of 4.0 A. Find a) the magnetic field in the solenoid
Two capacitors of capacitances 10.0 μF and 12 μF are connected in series. A third capacitor of 15 μF is then connected in parallel with the 10 μF capacitor. The network is connected to
An object, initially moving in the negative x-direction, is subjected to a change in velocity in the positive y-direction. If the resulting velocity vector is drawn from the origin, into which quadr
What is the kinetic energy of the block when it first slides back through the point at which the spring is relaxed?
A child whose weight is 289 N slides down a 6.60 m playground slide that makes an angle of 37.0° with the horizontal. The coefficient of kinetic friction between slide and child is 0.0890.
An object moves at a constant velocity of 11 m/s to the southwest for an interval of 20 s. Halfway through this interval, what is the magnitude of its instantaneous velocity?
How would you calculate concentrations of H30 and OH? thought it was simply 10^(-pH) but I am getting a more specific number than that as the apparent answer.
In a 2 dimensional Cartesian system, the x-component of a vector is known, and the angle between vector and x-axis is known. Which operation is used to calculate the magnitude of the vector? (taken
A taxicab moves five blocks due north, five blocks due east, and another two blocks due north. Assume all blocks are of equal size. What is the magnitude of the taxi's displacement, start to finish?