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Iron sulfide, FeS, is a sparingly soluble salt with a Ksp of 6.3 x 10^-18. Calculate the molar solubility of iron sulfide in a solution that is saturated with hydrosulfuric acid, H2S ( [H2S] = 0.1
How much later (in seconds) should the younger runner start in order to finish the the course at the same time as the old runner?
The Ka's for the three acidic protons of phosphoric acid H3PO4 are: 7.11 x 10-3, 6.32 x 10-8, and 4.5 x 10-13. It may be helpful to write out the three dissociation reactions along with their Ka's a
A rocket, initially at rest on the ground, accelerates straight upward from rest with constant acceleration 29.4 m/s^2. The acceleration period lasts for time 6.00 s until the fuel is exhausted. Aft
A 12.0g sample of 24Na is prepared at 8:00am of Tuesday for a circulation test. Unfortunately, the doctor forgot to sign the forms and couldn't be reached until Thursday at noon.
A jet airliner moving initially at 300 mi/h due east enters a region where the wind is blowing at 105 mi/h in a direction 36.0 degrees north of east. What is the new velocity of the aircraft relativ
The blocks slide over a surface, along the x axis. The coefficient of kinetic fiction between the blocks and the surface is (a) 0 (b) 0.1 What is the force from block A on block B in each case?
What are the resonance structures and intermediates in the formation of bromoacetanilide from the reaction of acetanilide and bromine liquid with acetic acid?
A spherical capacitor is formed from two concentric spherical conducting shells separated by vacuum. The inner sphere has a radius of 12.5cm, and the outer sphere has a radius of 15.1 cm. A potentia
What is the composition of the vapor of a pentane-hexane solution that has a vapor pressure of 357 Torr at 25C vapor pressures at 25 C= pure pentane is equal to 511 torr, pure hexane equals 150 torr
The other pushes with a force B, which has a magnitude of 325 newtons and is directed due north. What are the magnitude and direction of the resultant A + B applied to the crate?
A taut rope has a mass of 0.165 kg and a length of 3.55 m. What power must be supplied to the rope so as to generate sinusoidal waves having an amplitude of 0.120 m and a wavelength of 0.495 m and
The best leaper in the animal kingdom is the puma, which can jump to a height of 11.0 ft when leaving the ground at an angle of 50°. With what speed, in SI units, must the animal leave the groun
A solid consists of a mixture of NaNO3 and Mg(NO3)2. When 6.50 g of the solid is dissolved in 50.0 g of water, the freezing point of the solution is lowered by 5.37 C. What is the composition by mas
The filament of a light bulb has a resistance of 570 . A voltage of 120 V is connected across the filament. How much current is in the filament?
A golf ball is hit with an initial angle of 38.5° with respect to the horizontal and an initial velocity of 81.5 mph. It lands a distance of 86.8 m away from where it was hit. By how much did th
What was the percentage by mass of Mg(OH)2 in the original sample? [Hint: When Mg(OH)2 or Al(OH)3 reacts with HCl(aq), the products are a chloride salt, water and CO2(g). Assume that all of the CO2(
What mass of salicylic acid is needed to produce one extra strenght tablet of aspirin if the reaction has 60% yield. Please show work and correct sig figs.
A brick is thrown upward from the top of a building at an angle of 25 degrees to the horizontal and with an initial speed of 11 m/s. If the brick is in flight for 3.3 s, how tall is the building?
A particle (charge = +2.0mC ) that moves where only electric forces act on it has a kinetic energy of 5.0 J at point A. The particle passes through point B that has an electric potential of +1.5 kV
The standard free energy of activation of a reaction A is 77.7 kJ mol-1 (18.6 kcal mol-1) at 298 K. Reaction B is one million times faster than reaction A at the same temperature.
A point charge Q is placed at the origin. A second charge, 2Q, is placed on the x axis at x = -3.0 m. If Q = 50 μC, what is the magnitude of the electrostatic force on a third point charge, -Q, p
What is the internal energy change of a gas gives off 312 of heat while being compress 862mL by a pressure of 1.64 bar? What are internal energy change in surrounding and universe for the process?
The width of the intersection is 25.0 m. The plane decelerates through the intersection at a rate of 6.3 m/s2 and clears it with a final speed of 47 m/s. How much time is needed for the plane to clear
A scale is constructed using the 10 kg mass, the 2 kg pan P, and the pulley and cord arrangment. Cord BCA is 2m long. If s = .75 m, determine the mass D in the pan. Neglect the size of the pulley.