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Or we can say, at this rate, how long will it take for half ozone to disappear? If Q0 is initial quantity of ozone, then Q=Q0e-0.0025t, then determine t.
When the temperature is increased by 10 degrees the rate constant for a reaction is doubled. Which reaction has the greater activation energy and why?
Compute the final position relative to the last lens and its magnification relative to the original object if (i) all the three lenses are positive and (ii) the first and last lenses are negative.
Discuss how pure samples of each component could be obtained by the preparative gas chromatography from a mixture of two components even if the complete resolution of the peaks is not obtained.
When the tape pulled from the dispenser consists of 0.14 micro coulombs of charge per centimeter, determine what length of tape should be pulled to transfer 1.8 *10^13 electrons to the remaining tap
Four particles, one at each of the four corners of the square having 2.5 m long edges, are joined by mass-less rods. The masses of particles are m1 = m3 = 4.0 kg and m2 = m4 = 8.0 kg. Determine the
A chunk of metal of 6 g, initially at 15 °C having a heat capacity of 3 cal/g °C is positioned in 27 g of water at 90 °C. Determine the final temperature of the mixture?
What is the pH of the solution after 50.0 of base has been added? 100ml of .200 M HCl is titrated with .250 M NaOH. What is the pH of the solution at the equivalence point?
Everyday sally saved the penny, dime, and quarter. Determine least number of days needed for her to save the amount equivalent to integral number of dollars?
Assume that that there is a seismic P wave traveling at 5.1 x 10^3 m/s having a wavelength of 1.9 X 10^3 m. i) Determine the wave’s frequency.
The ionization energy of Li is 520 kJ/mol. Calculate the minimum wave length of light needed to ionize one atom in the gaseous state and the ionization energy in Joules per atom in the gaseou
To indicate the stereochemistry about double bonds, place the groups attached to the double bonds in appropriate positions with 120 degree bond angles. Sketch the structure of(2S,3Z)-2-fluoro-3-hexe
If it is 6:00, the hour hand on an analog clock is 180 ahead of the minute hand. Determine how many minutes elapse (to three significant digits) before the minute hand next points in the similar dir
Graph of F(x)=x3 is shifted six units left , stretched vertically by the factor of 4, reflected in y axis and three units up. Determine equation of described function?
After the other 9.90 s, he throws a mallet having a speed of 6 m/s in the similar direction. The mallet consists of a mass of 1050 g. Determine how fast is the astronaut moving after he throws the m
The next day, the volume of air filled balloon has decreased by 4.7 %. Two identical balloons are filled to the same volume, one with air and one with helium. By what percent has the volume of the h
Determine the mass of the sample of silver (g). It takes 1.15 kJ of energy to heat a sample of pure silver from 12.0°C to 14.9°C.
At the bottom of the hill the terrain levels out. As the man reaches the horizontal part, he grasps a 20 kg backpack and skis off a 2.0 m high ledge. Find out at what horizontal distance from the ed
If you obtained (-)-tartaric acid in your experiment, what salt would you obtain in the precipitate? Which isomer of a-phenylethylamine would you get from this in a resolution of a racemic mixture e
A base-ball is thrown from the roof of the building of height 20.8 m having an initial velocity of magnitude 10.5 m/s and directed at an angle of 56.4degrees above the horizontal. Determine the spee
Determine the concentration of the diluted 1mlof Fe(NO3)3 solution? Transfer 4ml of the 0.0025M of Fe(NO3)3solution to a 100ml volumetric flask. Add distilled water til you fill up to 100ml mark
A sample which is having 25.5-g of an unknown metal is heated to 95.5°C and is placed in a insulated container containing 174 g of water at a temperature of 21.0°C. After the metal coo
The local computer store is having the terrific sale on digital camera. After the 40% price reduction, you buy the digital camera for $276. Determine camera's price before reduction?
Compute the classical momentum of a proton traveling at 0.995c, avoiding relativistic effects.
Suppose that the Ferris Wheel is a circular disk having radius 0.35 m and mass 5 kg. Determine the magnitude of the total torque on the Wheel in N • m?