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A machine has an 760 g steel shuttle that is pulled along a square steel rail by an elastic cord . The shuttle is released when the elastic cord has 25.0N tension at a 45 degree angle.
A .2420g sample containing calcium is dissolved, and the metalprecipitated as CaC2O4. The precipitate is filtered, washed and re-dissolved in acid. The pH is adjusted. 25mL of .0400M EDTA areadded,
You run a race with your friend. At first you each have the same kinetic energy, but then you find that she is beating you. When you increase your speed by 29%, you are running at the same speed she
Calculate the equilibrium concentrations of H2, I2 and HI at 700 Kif the initial concentrations are [H2] = 0.100 M and [I2] = 0.200M.
The enthalphy change for any reaction can be obtained by subtracting the sum of the enthalpy changes of formation of the reactants from the sum of the enthalpy changes of the formation of the produc
At a distance r from a point charge, the electric potential is 1400 V and the magnitude of the electric field is 1.0×10^5 V/m. A) What is the electric potential at distance r/2 from the charge?
Find the values for the enthalpy changes of the formation of NaOH (aq), HCl(aq), KOH(s), and KOH(aq)
Nitrogen is dissolved in water with the total pressure of gas(Nitrogen + water vapor) over the water being 1.40 atm. The temperature is 25o C.
The flash unit in a camera uses a special circuit to "step up" the 3.0 V from the batteries to 340 V, which charges a capacitor The capacitor is then discharged through a flashlamp. The discharge ta
A dilute solution of bromine in carbon tetrachloride behaves asan ideal-dilute solution. The vapour pressure of pure CCl4 is33.85 Torr at 298K. The Henry's law constant when the concentration of Br2
An electron that has a velocity with x component 2.8 x 106 m/s and y component 3.4 x 106 m/s moves through a uniform magnetic field with x component 0.029 T and y component -0.22 T. (a) Find the mag
In an RC series circuit, e = 12.0 V, R = 1.81 MO, and C = 2.59 µF. (a) Calculate the time constant. (b) Find the maximum charge in microcoulombs that will appear on the capacitor during chargi
If the mixture at equalibrium is compressed to half its origanal volume, will the reaction proceed to the left or the right to reestablish equalibrium?
A -10.0 nC point charge and a +20.0 nC point charge are 14.7 cm apart on the x-axis. A) What is the electric potential at the point on the x-axis where the electric field is zero?
A piece of aluminum foil of mass 2.6 x 10-2 kg is suspended by a string in an electric field directed vertically upward. If the charge on the foil is 4.5 µC, find the strength of the field tha
A) What is the speed of the alpha particle when the particles are 1.4 nm apart? B) What is the speed of the antiproton when the particles are 1.4 nm apart?
You need 1000mL of 0.154M NaCl, but the only solution available is 1.50M NaCl. How much of this stock soluiton will you measure out to make your solution? (C1V1=C2V2)
The string will break if its tension exceeds 50.0 . The stone is whirled in a horizontal circle on a frictionless tabletop; the other end of the string remains fixed. Find the maximum speed the ston
A tuning fork of frequency 1000 Hz is mounted 25 cm from the axis of a rotating horizontal table turning at a rate of 4 revolutions per second. What are the highest and lowest frequencies heard by a
There are 18mg of iron in a vitamin tablet. If there are 100 tablets in a bottle, how moles of iron are contained in the vitamins in the bottle?
A uniform rod (length L = 1 0 . m, mass = 2 0 . kg ) is suspended from a pivot a distance d = 0.25 m above its center of mass. The angular frequency in rad/s for small oscillations is approximately
The lowest A on a piano has a frequency of 27.5 Hz. If the tension in the 2.0 meter string is 308 N, and one-half wavelength occupies the wire, what is the mass of the wire in kg?
A piece of dry ice (solid carbon dioxide) with a mass of 28.8g is allowed to sublime (convert from solid to gas) into a large balloon.
A 0.300g sample of propionic acid was dissolved in water to give 50.0ml of solution. This solution was ttitrated with 0.150M NaOH. What was the pH of the solution when the equivalence point was reac
Spheres A and B are touched together and then separated. Spheres B and C are then touched and separated. Does sphere C end up with an excess or a deficiency of electrons and how many electrons is it