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A 0.89% (w/v) sodium chloridesolution is referred to as physiological saline solution because ithas the same concentration of salts as human blood. What is the molarity of a physiological saline sol
A roller coaster moving with a constant speed of 13 m/s, goes up and over a hill that has the shape of a circle at the top. If the radius of curvature of this section of the track is r = 32 m, find
Calculate the pH at the equivalence point for the titration of 20.0mL of 1.00 M HF with 0.500 M NaOH. Ka=3.5x10-4 for HF.
During an Apollo lunar landing mission, one astronaut stayed in the command module which continued to orbit the Moon while two astronauts walked on the moon. If the command module was at an altitude
A 69-g handball moving with a speed of 4.3 m/s strikes the wall at an angle of 38° with the normal, and then bounces off with the same speed at the same angle with the normal. It is in contact w
When she reaches the north end of the raft she is running at 4.4 m/s relative to the raft. At that instant, what is her velocity relative to the water?
In a particular reaction between copper metal and silvernitrate, 12.7 g Cu produced 18.1 g Ag. What is the percent yield of silver in this reaction?
If the magnetic force exerted on this wire per meter is 0.037 N, what is the magnitude of the magnetic field?
Metallic copper is formed when aluminum reacts with copper(II) sulfate. How many grams of metallic copper can be obtained when 54.0 g of Al react with 319 g ofCuSO4?
You would get a greater shock from touching the leads of the one with high capacitance than you would from toughing the leads of the other one. from this information, explain what causes the sensati
A 35.0-L tank contains 7.00 mol of compressed gas. If the pressure inside the tank is 500.0 kPa, what is the temperature of the compressed gas.
The gas bag is about 30 meters long with a diameter of about 10 meters, and it is filled with helium (density about 4 grams per 22.4 liters under these conditions). Estimate the total mass of the bl
Indicate the signs of the electrodes.D.) Do the electrons flow from the Zinc electrode to thenickel electrode or from the nickel to the zinc?E.) In which direction do the cations and the anions migr
There is no friction between crate 1 and the table. What is the acceleration of m1? what is the tension in the portion of the rope between the pulley and m1? What is the tension in the portion of th
To obtain water each day a bird in the winter eats 5.00g of snowat 0 degree C. How many kilocalories of energy does it take to melt the snow and warm the liquid to the body temperature of the bird a
The label on liquid Gaviscon states that each tablespoon (15mL) contains 95 mg of aluminum hydroxide and 412 mg of magnesiumcarbonate. How many moles of hydronium ion can be neutralized by one tabl
A 8.00 kg shell at rest explodes into two fragments, one with a mass of 1.00 kg and the other with a mass of 7.00 kg. If the heavier fragment gains 140 J of kinetic energy from the explosion, how much
A reaction in solution, A+B-->P, is studied and found to havethe rate law: Rate = k[A] with a rate constant of 3.5 x 10-3 s-1.
A parallel-plate capacitor has 2.00 cm2 plates that are separated by 6.00 mm with air between them. If a 12.0 V battery is connected to this capacitor, how much energy does it store?
On a planet far, far away, an astronaut picks up a rock. The rock has a mass of 4.80 kg, and on this particular planet its weight is 40.8 N. If the astronaut exerts an upward force of 50.0 on the ro
What is the pH of a buffer that is 0.175M in a weak acid and 0.213M in the acid's conjugate base? The acids ionization constant is 5.7 * 10-4.
Consider the H atom. Use eV for energies and show your calculation. a.) Calculate the energies of the first four levels of the atom.
A weather balloon is prepared for lift off at the NorthPole. The balloon is filled with 15,000 L of heliumgas. The conditions at the launch site are 760 mm Hg and0*C.
If the inductor is a solenoid with 405 turns, what is the average magnetic flux through each turn when the current is 0.725 A?
A 2.0 kg box is raised from rest a distance of 5.0 m by a vertical force of 130 N. (a) Find the work done by the force. (b) Find the work done by gravity. (c) Find the final kinetic energy of the box.