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Determine the frequency of the coil's rotation when the peak emf of the generator is 163 V?
What is the molality of ethanol in a solution prepared by dissolving 5.00 mL of ethanol (C2H5OH, of density 0.800 grams/mL) in 25.0 mL of water (H2O, of density 1.000 grams/mL)?
A metal bar 1.6m long at room temperature,21c the bar is put into an oven and heated to a temperature of 84c.It is then measured and found to be 1.7mm longer. What is the coefficient of linear expa
What is relative amount of electric energy that will need to be used in both cases to cool a can of water (330 ml) from room temperature to +8 oC? Assume ideal operation of both systems.
225 kg sample of tin initially at 97.5 is dropped into .115 kg of water initially at 10.0°C. If the specific heat capacity of tin is 230 J/kg x °C, what is the final equilibrium temperature
As viewed by a bystander, a rider in a "barrel of fun" at a carnival finds herself stuck with her back to the wall. What is the free body diagram?
If 50.00 mL of 1.00 M HC2H3O2 (Ka= 1.8 x 10^-5) is titrated with 1.00 M NaOH. what is the pH of the solution after the following volumes of NaOH have been added.
25 mL of 0.100 M lactic acid ( Ka= 1.4 x10^-4) is titrated with 0.097 M KOH. What is the pH of the solution before titration?
A sample of propane, C3H8, contains 10.8moles of carbon atoms. How many total moles of atoms does the sample contain?
Bonnie and Clyde are sliding 310 {rm kg} bank safe across the floor to their getaway car. The safe slides with a constant speed if Clyde pushes from behind with 440 {rm N} of force while Bonnie pull
The concentrations are [H2CO3] = 0.0012 M and [HCO3-] = 0.024 M. pKa for carbonic acid = 6.1. Explain why the pH of blood is 7.4.
A dog sits 1.08 m from the center of a merry- go-round with an angular speed of 1.38 rad/s. If the magnitude of the force that maintains the dog's circular motion is 34.7 N, what is the dog's mass?
An 52.0 N box of clothes is pulled 6.7 m up a 30.0° ramp by a force of 107 N that points along the ramp. If the coefficient of kinetic friction between the box and the ramp is 0.22, calculate th
Calculate the entropy of unfolding of lysozyme at 25 oC, given that the difference in C P of unfolding is 6.28 kJ/mol/K at both 25 oC and 75 oC.
Suppose, instead, that the heat capacity depends on the temperature as C = a+ bT+ a2 . Find an expression for the change in entropy accompanying heating from Ti to Tf.
A ship sets out to sail to a point 120 km due north. An unexpected storm blows the ship to a point 131 km due east of its starting point. (a) How far (in km) and (b) in what direction (as an angle f
Evaluate reversibility of a process where an ideal monoatomic gas is first slowly compressed 10- fold by a gradually increasing external pressure.
How many kilojoules of heat are absorbed when 40.4g of MgO(s) is decomposed into Mg(s) and O2(g) at constant pressure?
What volume of a 0.310 M NH4I solution is required to react with 979 mL of a 0.500 M Pb(NO3)2 solution?
40 g of liquid Nitrogen (boiling point = -190 C) is poured into a styrofoam cup containing 200 g of water at 50.5 C. Calculate the molar heat of vaporization of liquid Nitrogen if the final tempera
75.0 g of H2O at 23.0 oC is added to 100.0 g of H2O at 67.5 oC. What is the temperature of the resulting mixture?
Assume that patient blood lead levels are 0.590. What minimum mass of succimer in milligrams is needed to bind all of the lead in a patient's bloodstream?
Two nonconservative forces are present: friction does -2.00 104 J of work on the car, and a chain mechanism does +3.00 104 J of work to help the car up a long climb. What is the change in the car's
The Kw for the dissociation of H2O varies with temperature. At 90°C, Kw = 1.0 x 10-13. explain why pH = 6.5 is neutral at this temperature and why pH = 7 is basic.
Calculate ΔH°rxn for this reaction. ΔH°f [NaNO3(s)] = -467.8 kJ/mol; ΔH°f [NaHSO4(s)] = -1125.5 kJ/mol; ΔH°f [H2SO4(l) = -814.0 kJ/mol; ΔH°f [HNO3(g