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In heating an organic compound strongly with metallic sodium, one frequently observes the formation of a blck material, which is insoluble in water
A loud speaker diaphragm is producing a sound for 2.5s by moving back and forth in simple harmonic motion. How many times does the diaphragm move back and forth
The pendulum is now swinging on Pluto. Calculate the new period of oscillation in terms of T, knowing that on Pluto the gravity is 1/16 of gravity on the Earth
What is the pH of a buffer that results when 0.40 mol NaHCO2 is mixed with 100.0 mL of 2.00 M HCl and diluted with water to 250 mL (Ka of HCO2H=1.8*10^-4.
A mixture of Compound X and its enantiomer are placed in the polarimeter and the observed rotation is -5.1 degrees. Which enantiomer is in excess (+ or -)? Calculate the enantiometric
A camera flash delivers 2.9 kW of light power for 1.3 ms. Find the total momentum carried by the flash
What is the enthalpy change for the reverse reaction. Hreverse = kJ/mol. (b) Balance the forward reaction with whole-number coefficients. What is H for the reaction represented by this equation? H =
The rotor in a certain electric motor is a flat, rectangular coil with 84 turns of wire and dimensions 2.45 cm by 4.04 cm. The rotor rotates in a uniform magnetic field of 0.800 T. Find the peak pow
Consider the reaction given below. H2(g) + F2(g) 2 HF(g) (a) Using thermodynamic data from the course website, calculate G° at 298 K. kJ (b) Calculate G at 298 K if the reaction mixture consists
If the atom could be enlarged to the size of a football field, and the electrons were represented by gnats, how large would the nucleus be
Electrons in a photoelectric experiment emerge from an aluminum surface with a maximum kinetic energy of 1.3eV
A broken-down spaceship (Star Wreck?) flies across an international soccer field, How long does the spaceship pilot measure the field to be
A person weighing 119 pounds can run up 500 steps, How much power did the person expend running up the steps
An elevator can lift a 125 N aircraft a distance of 22 meters in 12 s. What is the power output of the elevator
An electron moves to the right with a speed of 0.84c relative to the laboratory frame. Find the speed of the proton relative to the laboratory frame
Consider the reaction 2 NO2(g) N2O4(g) . (a) Using Gf N2O4(g) = 97.79 kJ/mol and Gf NO2(g) = 51.3 kJ/mol, calculate G° at 298 K. kJ (b) Calculate G at 298 K if the partial pressures of NO2 and N
A soldier has a huge contraption that notches a large 4 kg arrow (it looks more like a lance) in a massive bow and uses a winch system to draw the arrow back to set the bow. What is the speed of the
Consider the reaction shown below. PbCO3(s) PbO(s) + CO2(g) Calculate the equilibrium pressure of CO2 in the system at the following temperatures. (a) 260°C atm (b) 500°C atm
A rail car that weighs 35 N is accelerated at 7.7 m/s/s for 5.6 seconds. How much work is done on the rail car
Calculate the moles of hydrogen gas produced by the reaction of 0.848 g of aluminum with hydrochloric acid Thanks
A uniform ladder of length L and mass m leans against a frictionless vertical wall, making an angle of 48° with the horizontal. how high can you climb before the ladder begins to slip
Thiosulfate was used to mask the copper in a 20.00 mL aliquot. Titration of the lead and zinc in this aliquot required 34.06 mL of the EDTA solution.
A 50.0 mL sample containing Cd2 and Mn2 was treated with 69.6 mL of 0.0600 M EDTA. Titration of the excess unreacted EDTA required 11.9 mL of 0.0220 M Ca2
A 6.00 kg ball is dropped from a height of 11.0m above one end of a uniform bar that pivots at its center. The bar has mass 7.50kg, How high will the other ball go after the collision
A 237 kg cart runs into the rear end of a 120 kg cart that is stationary. What is the speed of the moving cart before the collision