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The standard free energy change for N2O4(g) ? 2 NO2(g) is 5.4 kJ at 25oC. a) What is the equilibrium constant for this reaction? b) What is ?G if we set up the flask to start with 0.450 atm N2O4 and
The atmosphere of the sun consists mostly of hydrogen atoms (not molecules) at a temperature of 6000 K. What are the average translational kinetic energy per atom
What would you guess is the sign for the change in entropy for this reaction. b) What is the expected sign for the change in free energy for this reaction c) Finally, what is the expected sign for t
Determine the direction of a reaction in a solution containing initially 10-4M acetaldehyde, 0.1M ethanol, 0.1M pyruvate, and 10-2M lactate. What is the value of Gibbs' function for this reaction
A horizontal force of 200 N is applied to a 55-kg cart across a 10-m level surface. If the cart accelerates at m/s^2, then what is the work done by the force of friction
You need to prepare 100.0 mL of a pH=4.00 buffer solution using 0.100 M benzoic acid (pKa = 4.20) and 0.200 M sodium benzoate. How much of each solution should be mixed to prepare this buffer
Two identical cars (m = 1350 kg) are traveling at the same speed of 18.9 m/s. What is the magnitude of the total momentum of the two cars
What is the angle of incidence in air of a light ray whose angle of refraction in glass is half the angle of incidence? Assume the refractive index of glass is 1.50
A girl is using a rope to pull a box that weight 300 N across a level surface with constant velocity. what is the normal force of the floor on the box
A gas cylinder with a movable piston initially contains .25 moles of neon in a 5 L. If .5 moles of helium are added to this gas cylinder, what will be the final volume
A 100 kg crate is pushed at constant speed up the frictionless 31° ramp shown in the figure. What horizontal force F is required
The cranberry juice control is 27% juice when purchased from a local grocery store. Provide the calculations required to prepare the series of standard solutions of cranberry juice
A force accelerates a body of mass M. The same force applied to a second body produces three times the acceleration. what's the mass of the second body
A 15-kg block rests on a level frictionless surface and its attached by a light string to a 5.0-kg hanging mass, What is the tension in the connecting string
A pickle is made by soaking a cucumber in brine, a saltwater solution. What makes the smooth cucumber become wrinkled like a prune
The surface between a 12kg block , the 16kg wedge and between 16 kg wedge and the horizontal plane are smoothe, What is the force F which must be exerted on the 16 kg block in order that the 12 kg blo
4 lbm of water is in a volume of 10.0 ft3 at 60 psi. The water undergoes an isobaric change of state until the temperature is 500°F. Find the temperature at the initial state
An object moves 20 m east in 30 s and then returns to its starting point taking an additional 50s. what is the average speed of the object
If a curve with a radius of 83 m is properly bamked for a car traveling 70 km/h, what must be the coefficient of static friction for a car not to skid
A 2.0-cm-diameter spider is 1.50m from a wall. Determine the focal length of a lens that will make a half-size image of the spider on the wall
Tarzan swings on a 30.0?m?long vine initially inclined at an angle of 370 with the vertical. What is his speed at the bottom of the swings if he starts from rest
Space debris left from old satellites and their launchers is becoming a hazard to other satellites. How much energy in joules is generated by the collision
A professor's office door is 0.96m wide, 2.2mhigh, 4.0cm thick; has a mass of 26kg , and pivots on frictionless hinges. what is its angular acceleration immediately afterward
Sarge notices that the cable is susceptible to vibrations. He drives the rope at a frequency such that the center of the span goes through the largest amount of motion. What frequency does Sarge dri
A projectile is launched at an angle of 45° above the horizontal. What is the ratio of its horizontal range to its maximum height