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A 12 L tank contains helium gas pressurized to 160 atmosphere. What size tank would be needed to contain this same amount of helium at 1 atmosphere
A 25 kg box is released from rest on a frictionless ramp making an angle of 42o with the horizontal. Determine the normal force on the box
List the molecular geometry and the electron pair arrangement of all possibilities that would give a polar molecule when all the surrounding atoms are identical.
A clay vase on a potter's wheel experiences an angular acceleration of 8.21 rad/s2 due to the application of a 17.7-N m net torque. Find the total moment of inertia of the vase
A block is in equilibrium on a frictionless incline plane due to a tension force from a string that is wrapped around a pulley, find the masses m1 and m2 of the blocks
Two automobiles of equal mass approach an intersection. One vehicle is traveling with velocity 14.9 m/s toward the east, What was the initial speed of the northward-moving vehicle
A railroad car of mass 2.1 104 kg moving at 3.50 m/s collides and couples with two coupled railroad cars, What is the speed of the three coupled cars after the collision
you apply a potential difference of 4.5 volts between the ends of a wire that is 2.5 m in length and .654mm in radius. What length of nichrome wire will you use
A step-down transformer is used for recharging the batteries of portable devices. find the power delivered to the CD player
What is the white precipitate that forms while the reaction mixture is heated. The reaction is the hydrolysis of the ester Butyl benzoate yields products 1-butanol and benzoic acid.
In what volume ratio should you mix 1.0M solutions of NH4Cl andNH3 to produce a buffer solution having pH = 9.80
Calcium reacts with fluorine gas to produce calcium fluoride. How many moles of Ca will react with 1.0 moles of F2
A boy is on a Ferris wheel, which takes him in a vertical circle of radius 7.6 m once every 15.0 s. What is the angular speed of the Ferris wheel
The titration reaction is CO3^(2-) + 2H+ yields H2O + CO2 What is the concentration of HCl if 25.9 mL of HCl was needed to to react with 0.311 g of Na2CO3 to reach the end point
What is the [H3O+] in a buffer that consists of 0.30 M HCOOH and 0.20 M HCOONa? Ka=1.7x10^-4
The specific heat of granite is 0.80 kJ/kg x C. If 106 MJ of heat are added to a 100-kg granite statue of James Prescott Joule that is originally at 18 degrees C
You add 1.0mL of 1.00 M HCl to the buffer. Calculate the molarity of H3O+ added as HCl, and the final molarities of acetic acid and acetate ion at equilibrium. what is the new value of pH
You are designing a small coil (called a search coil) to measure magnetic fields. It is to have a diameter of 3.80 cm, How many turns should the coil have
A 1055-kg van, stopped at a traffic light, is hit directly in the rear by a 790-kg car traveling with a velocity of +2.40 m/s. What is the final velocity of each vehicle
If you were to precipitate lead, which of the 4 ions would you add and why; OH, CO3, S, SO4
Consider an ideal gas at 27 degree C and 1 atm. To get some idea how close these molecules are to each other, What is the length of an edge of each cube if adgacent cubes touch but not overlap
What is the fraction of association (?) for the following potassium propionate solutions? Ignore activities. The Ka of propanoic acid is 1.34 x 10-5.
You're convinced the opera is almost over because of the large women singing a loud vibrato. What is the power coming from her voice
Given the reaction NH3 + H2O = NH4 + OH ; Under what conditions might it go to completion in either direction
A potential difference of 5.80 V will be applied to a 35.00 m length of 18-gauge tungsten wire, Calculate the rate at which thermal energy will appear in the wire