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You are titrating 50.00 ml of unknown concentration of HNO3 with 0.487 M lithium hydroxide. You add 25.34 ml of lithium hydroxide to reach the neutralization point. Write the neutralization reaction
A hypothetical 40cm long arm is assumed to be weightless. What is the maximum weight that can be held in the hand if the muscle is attached 1 cm from the below
The OH- concentration in an equilibrium 0.101 M NH3 solution is 1.30*10^-3 M. Calculate Kb of NH3.
The temperature of 15 kg of water increases at 0.003 degrees Celsius per second. At what rate is the internal energy of the water increasing
A hydrogen atom is moving at a speed of 125.0 m/s. It absorbs a photon of wavelength 97 nm that is moving in the opposite direction. By how much does the speed of the atom change
Given Keq=kr/kf= 0.5 suppose the addition of an enzyme increases kf by a factor of 10^9, (a) calculate Keq for this reaction (b) suppose you add an enzyme that increases Kf by a factor of 10^9, what
Show all the steps for determining the overall net ionic equation by the method of half reactions for the redox reaction of permanganate with oxalic acid. the two unbalanced half reactions are MnO4
You want to use a lens with a focal length of 37.0cm to produce a real image of an object, with the image twice as long as the object itself. Where should the object be placed
The dipole moment of hydrogen chloride is 1.08D while that of hydrogen bromide is 0.82D. On the basis of dipole-dipole interactions, hydrogen chloride should have a higher boiling point than hydroge
a man has to install an instrument on top of the mast of his sailboat. He uses a boson's chair to hoist himself up. With what acceleration does the man move up
Helium has a lower boiling point than nitrogen. What do you conclude about the polarizability of helium in comparison to that of nitrogen
A particle starts from the origin with velocity 5 m/s at t = 0 and moves in the xy plane with a varying acceleration given by = (8t), Determine the velocity of the particle as a function of time
You are the design engineer in charge of the crashworthiness of new automobile models. What is the average force acting on the car by the inner barrier
If a non-cyclic alkane shows a molecular ion peak at m/z 464, what is the chemical formula
A 11kg hammer strikes a nail at a velocity of 8.7m/s and comes to rest in a time interval of 7.4ms, What is the impulse of the given nail
A 23-g bullet traveling 270m/s penetrates a 2.2kgblock of wood and emerges cleanly at 215m/s. how fast does it move after the bullet emerges
What is the half-reaction of P(s) going to the most common ion for O? Hint: P is under N in the periodic table so, their most common charge should be the same.
A ball is thrown so that its initial vertical and horizontal components of velocity are 50 m/s and 15 m/s, Estimate the maximum height the ball reaches
The mass spectrum of an organic compound shows the relative abundances of M to be 69.72% and M 1 to be 6.033%. Assuming the peaks are caused by 12C and 13C isotopes, determine the number of carbon a
A circular wire loop whose radius is 15.0 cm carries current of 2.50 A. What torque acts on the loop
A mass of 95 g of ice at 0C is combined with 105g of water at 25 C the final temperature of the mixture is 0 C what mass of ice melts. (heat of fusion=333J/g specific heat capacities ice=2.09, liqui
A particle of charge q = e moves in a circle of radius = 0.52 m with speed v = 1.550×107 m/s. find the maximum torque exerted on the loop by a uniform magnetic field of magnitude B = 0.50 T
Solid potassium ,K , can be reacted with molecular oxygen , O2 to form K2O. If 4.3 g of potassium are reacted with 2 dm^3 of pure O2 at 20 degree celsius and 101.325 kPa what will be the mass and/or
Two particles lie on an x axis, particle 1 at x = 1 m and particle 2 at x = 2 m. what happens to the center of mass of the two-particle system
A horizontal conductor in a power line carries a current of 5500 A from south to north. Find the magnitude and direction of the magnetic force