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3 Zn(s) + 2 Bi3+(aq) → 3 Zn2+(aq) + 2 Bi(s) What is the standard reaction free energy? Faraday's constant is 96485 C/mol. Answer in units of kJ/mol
Determine the angular speed of the minute hand and the hour hand of a clock(in radians per minute).
A gas expands and does P-V work on the surroundings equal to 3.2x10^2 J. At the same time, it absorbs 111 J of heat from the surroundings. Calculate the change in energy of the gas.
During backwashing process of a softener tank, resin in the tank is regenerated using brine solution. The Reynolds's number in the tank is needed to be maintained in a range of 4500 to 5500 for effe
An 8.0 m, 300 N uniform ladder rests against a smooth wall. The coefficient of static friction between the ladder and the ground is 0.55, and the ladder makes a 50.0° angle with the ground. How
when 0.60 mol of gas x and 0.40 mol of gas y react in a 2.0 l container tp produce z, an equilibrium is reached in which (z) is found to 0.80 mol/l. The reaction is x(g) + 2y(g)=2z(g). Calculate the
The 15 head of a bobble-head doll oscillates in SHM at a frequency of 4.0Hz . The amplitude of the head's oscillations decreases to 0.50 in 4.0. What is the head's time constant?
A 2.98 kg block initially at rest is pulled to the right along a horizontal surface by a constant, horizontal force of 19.8 N. The coefficient of kinetic friction is 0.11. The acceleration of gravi
He was surprised that most of the white solid melted sharply between 121 and 122oC but that a small amount remained unmelted even at temperatures above 200oC. Explain this behavior.
What is the radius of an automobile tire that turns with a frequency of 8 Hz and has a linear speed of 26 m/s?
Andy, age 16, lacks self-discipline, fails to plan ahead, and is quickly frustrated by challenging tasks. He is anxious and overly critical of others. Use the psychoanalytic, humanistic and social-
Write the equation for the overall reaction to be performed in the phase transfer catalysis experiment and label the nucleophilic and electrophile.
A 180-lb man and a 120-lb woman stand at opposite ends of a 300-lb boat, ready to dive, each with a 16 ft/s velocity relative to the boat. Determine the velocity of the boat after they have both di
A piston has an external pressure of 5.00 atm rm atm. How much work has been done in joules if the cylinder goes from a volume of 0.160 liters to 0.570 liters.
Two identical flutes produce fundamental notes of frequency 300 Hz at 27 degre3es. if the temperature of the air in one flute is increased to 31 degrees, what will be the number of beats heard per s
If an object has a moment of inertia 21 kg·m2 and rotates with an angular speed of 111 radians/s, what is its rotational kinetic energy?
A strip of aluminium of mass 23.8 g is dropped into a beaker of dilute hydrochloric acid. Calculate the work done (in J) on the surrounding atmosphere (1atm pressure, 19.9 oC) by the evolution of hy
A 61.9 kg person jumps from rest off a 2.86 m-high tower straight down into the water. Neglect air resistance during the descent. She comes to rest 1.13 m under the surface of the water. Determine t
A large box whose mass is 20 kg rests on a frinctionless floor. A mover pushes on the box with a force of 250 N at an angle of 35 degrees below the horizontal. What is the acceleration of the box a
It takes 480. J of energy to raise the temperature of 103.1 g mercury from 20.0°C to 53.5°C. Calculate the specific heat capacity and the molar heat capacity of mercury.
The stone is moving around the path at a constant frequency of 2.20 rev/sec. At the moment the stone is overhead, the stone is released. The magnitude and direction of the velocity of the stone when
a sample of of myoglobin with mass 1.00g is dissolvd in 100ml of aqeous solution. Theosmotic pressure of the solution is 11.0 torr at 25.00degree celcius . find the molar mass of myoglobin ?
A 4.00-kg model rocket is launched, expelling 60.0 g of burned fuel from its exhaust at a speed of 670 m/s. What is the velocity of the rocket after the fuel has burned?
a 244 g particle is released from rest at point A inside a smooth hemispherical bowl of radius 35.2 cm, calculate the gravitational potential energy at relative to B