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The equilibrium constant for the reaction is 4.2 x 10 -2 calculate the reaction coefficient and determine in which direction the reaction is moving.
A 2.1 x 10^3 kg car starts from rest at the top of a driveway tat is sloped at an angle of 20 degrees with the horizontal. An average friction force of 4.0 x 10^3 N impedes the cars motion so that
A space traveler weighs 550 N on earth. What will the traveler weigh on another planet whose radius is three times that of earth and whose mass is twice that of earth?
A Cessna aircraft has a lift-off speed of 130 km/h. What minimum constant acceleration does this require if the aircraft is to be airborne after a take-off run of 200 m?
A solution containing 9.80g of barium chloride is mixed with a solution containing 5.10g of sodium sulfate. a)What reactant is in excess? b)Determine the excess reactant. c)Predict the mass of the p
Now find the magnitude of the force on an electron placed at point P. Recall that the charge on an electron has magnitude e = 1.60 times 10^{-19} ; {rm C}.
The cylinders are rigidly connected to each other but are free to rotate without friction on a common axle. The moment of inertia of the pair of cylinders is I = 45 kgm2 Also r1 = 0.5 meter, r2 = 1.
If the total pres- sure is 780 torr, the CO has a partial pressure of 330 torr and the CO2 has a partial pressure of 330 torr, what is the partial pressure of O2?
A buffer consists of 0.22 M Na2HPO4 and 0.2 M Na3PO4. Given that the K values for H3PO4 are, Ka1 = 7.2 x 10-3, Ka2 = 6.3 x 10-8, and Ka3 = 4.2 x 10-13, calculate the pH for this buffer.
An ac generator has a frequency of 2.4 kHz and a voltage of 240 V. An inductance L1 =6.0 mH is connected across its terminals. Then a second inductance L2 =10 mH is connected in parallel with L1. Fi
What volume in mL will a sample of F2 occupy in a syringe at 5.5 atm , if the F2 has a volume of 25.0 mL at 1.2 atm?
A block hangs in equilibrium from a vertical spring. When a second identical block is added, the original block sags by 7.00 cm.What is the oscillation frequency of the two-block system?
Assuming the solution has a heat capacity of 4.18 J/°C·g and assuming no heat loss to the calorimeter, calculate the enthalpy change for the dissolution of NH4NO3 in units of kJ/mol.
A box of textbooks of mass 24.7 kg rests on a loading ramp that makes angle a with the horizontal. The coefficient of kinetic friction is .25 and the coefficient of static friction is .37. Find the
50.0 g of KCl at 27.0 °C is dissolved in 100. mL of 27.0 °C water in a coffee cup calorimeter. What is the final temperature of the salt solution? Assume that the heat capacity of the
A Federation starship (1.0 106 kg) uses its tractor beam to pull a shuttlecraft (1.0 104 kg ) aboard from a distance of 8 km away. The tractor beam exerts a constant force of 4.0 104 N on the shuttl
A closed organ pipe 0.8 m long has a diameter of 7.0 cm. The air in the church is 15oC. What is the speed of sound at 15oC?
Ethanol, is added to gasoline to produce E85, a fuel for automobiles engines. How many grams of O2 are required for complete combustion of 421g of ethanol ? When C2H5OH +3O2 produces 2CO2 + 3H2O.
A toy cannon uses a spring to project a 5.40 g soft rubber ball. The spring is originally compressed by 5.09 cm and has a force constant of 7.97 N/m. When the cannon is fired, the ball moves 15.3 cm
A student titrates 50 mL of apple juice and reports the following in the titration to the phenolphthalein end? What is the concentration of the total available acide in moles/L of the apple juice?
A bucket of mass 2.00 is whirled in a vertical circle of radius 1.45 . At the lowest point of its motion the tension in the rope supporting the bucket is 23.0 .Q. WHAT IS THE SPEED OF THE BUCKET AND
A 2.10-kg object attached to a spring moves without friction (b = 0) and is driven by an external force given by the expression F = 3.20sin(2πt), where F is in newtons and t is in seconds. The f
Calculate the mass percent of a NaCl solution in which 176g of NaCl is dissolved in 3.35L of water at 25 °C (density = 0.997 g/mL).
However, when the flask cools some of the vapor condenses in the flask. As a result of this observation, will the reported molar mass of the liquid be too high, too low, or unaffected?
The minimum distance required to stop a car moving at 35.0 mi/h is 40.0 ft. What is the minimum stopping distance for the same car moving at 87.0 mi/h, assuming the same rate of acceleration?