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Determine the percent ionization of the following solutions of formic acid at 25 degrees centigrade (C) : a) 0.016 M, b) 5.7 X 10^-4, c)1.75 M
A purple beam is hinged to a wall to hold up a blue sign. The beam has a mass of mb = 6.1 kg and the sign has a mass of ms = 16.6 kg. What is the net force the hinge exerts on the beam
Now the gymnast (not holding any additional mass) walks directly above the right support. What is the force the left support exerts on the beam
When 2.00 g of hydrazine (N2H4) decomposed under constant-pressure conditions, 7.00 kJ of heat were transferred to the surroundings. What is pH for the following reaction? 3 N2H4(l) --> 4 NH3(g)
A child is pushing a merry-go-round. The angle through which the merry-go-round has turned varies with time according to ?(t)=?t+?t3, What is the initial value of the angular velocity
out of the options of sn2 substitution, e2 elimination, sn1, e1 how can you determine which reaction it will be given a reagant
In biological and medical applications, it is often necessary to study the autoionization of water at 37 degrees centigrade instead of 25 degrees centigrade. given that Kw for water is 2.5 X 10^-14
the index of refraction for red light in water is 1.331 and that for blue light is 1.340. what are the underwater angles of refraction for the blue and red components of the light
The acid-dissociation constant for hypochlorous acid (HClO) is 3.0 X 10-8 . Calculate the concentrations of H3O+, ClO-, and HClO at equilibrium if the initial concentration of HClO is 0.0090 M.
the index of refraction for crown glass is 1.512 at a wavelength of 660 nm (red), what is the angle of refraction for each wavelength
On the Moon\'s surface, lunar astronauts placed a corner reflector, off which a laser beam is periodically reflected. What is the difference in travel time for light that travels only through space t
Provide a synthesis of butane-2,3-diol from 1 or 2 carbon alkanes. Use any reagents. Show the steps and the products formed for each step.
A car with a mass of 1600 kg is initially traveling at 72 m/s. Find the energy required to stop the car
NaCl is an electrolyte that commonly used to melt ice by lowering its melting point. what is the lowest possible melting point for ice that could be obtained considering the solubility of NaCl in wa
How much heat is absorbed by a copper penny with mass 3.10 g whose temperature rises from -8.0*C to 37.0*C
A mass is attached to a vertical spring, which then goes into oscillation. At the high point of the oscillation, What is the period of oscillation
An electron of mass 9.1E-31 kg is released from rest at a distance of 7.1 E-10 m from a fixed electron. Find the maximum velocity (in meters/second) of the moving electron after release
If Delta H = -60.0 kJ and Delta S = -0.200 kJ/K, the reaction is spontaneous below a certain temperature. Calculate that temperature
A 640-g hollow ball 21cm in diameter is suspended by a wire and is undergoing torsional oscillations at a frequency of 0.78 Hz
An ?-particle has a charge of +2e and a mass of 6.64 10-27 kg. It is accelerated from rest through a potential difference that has a value of 1.38 106 V, What is the speed of the ?-particle
Balance the following full redox reactions using the lowest integer coefficients, in basic conditions. NiO2(s) + Zn(s) ? Ni(OH)2(s) + ZnO22?(aq)
A 66.5kg astronaut is doing a repair in space on the orbiting space station. She throws a 2.30kg tool away from her at 3.10m/s relative to the space station, With what speed will she begin to move
Balance the following chemical reaction using the lowest integer coefficients, in acidic conditions I?(aq) + BrO3?(aq) ? HIO(aq) + Br?(aq)
A friend speeds by you in her spacecraft at a speed of 0.770 c. It is measured in your frame to be 4.70m long and 1.45m high. What will be its length at rest
What would be more stable, 1,1-dimethylcyclopropane or cis-1,2-dimethylcyclopropane or trans- 1,2-dimethylcyclopropane