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In a RLC circuit, the rms current is 7.00 A, the maximum voltage 230. V and the current lags behind the voltage by 53.0 degrees. Find the average power dissipated in the circuit
Consider the following balanced thermochemical equation for the decomposition of the mineral magnesite. MgCO3(s) ? MgO(s) + CO2(g) ?Hrxn = 117.3 kJ
A 55.5 kg ice skater is moving at 3.99 m/s when she grabs the loose end of a rope, the opposite end of which is tied to a pole. What is the ratio of this force to her weight
A ray of light is incident on the surface of a block of clear ice at an angle of 34.0° with the normal, Find the angle between the reflected and refracted light.
Nitrogen oxides undergo many interesting reactions in the environment and in industry. Given the following information, calculate H for the overall equation
35MW of power at 45kV (rms) arrives at a town from a generator via 5.0? transmission lines. Calculate the emf at the generator end of the lines
Balance the equations for the formation of HBr(g) and H2S(g) from their elements in their standard states. Include H°f for each reaction.
An electromagnetic wave in a vacuum has a magnetic field with a magnitude of 1.29 × 10-6 T. What is the intensity S of the wave
A water-skier is being pulled by a tow rope attached to a boat. As the driver pushes the throttle forward, the skier accelerates, Determine the work done by the net external force acting on the skier
In a purity check for industrial diamonds, a 11.25 carat (1 carat = 0.2000 g) diamond is heated to 74.21°C and immersed in 27.30 g of water in a constant-pressure calorimeter
Phosphorus pentachloride is used in the industrial preparation of organic phosphorus compounds. Equation 1 shows its preparation from PCl3 and Cl2.
A circuit has a battery voltage of 12.0 V, a 5.60 pF capacitor and a 300 kOhm resistor. what energy is stored in the fully charged capacitor
A 1.0-kg block is pushed up a rough 22° inclined plane by a force of 7.0 N acting parallel to the incline. Determine the magnitude of the force of friction acting on the block
If 393.5 kJ of heat is released per mole of graphite and T increases 2.613 K, what is the heat capacity of the bomb calorimeter
What is the relationship between current and magnetic force, What is the relationship between the length of the wire and the magnetic force
Find the heat transferred (in kJ) when 5.55 L of ethylene glycol (d = 1.11 g/mL) in a car radiator cools from 40.0°C to 25.3°C.
A protostar has a temperature of 3000 K,radius of 2*10^8 km at stage 4. At stage 6, Calculate the star's change in absolute magnitude as it evolves from stage 4 to stage 6
What is the reaction order with respect to each reagent for the following reaction? Then write the rate law equation.
Object A of mass 1 kg and velocity 10 m/s east collides with object B of mass 2 kg and veocity 8 m/s south. What is the velocity of object B after the collision
A 1kg ball with a speed of 3 m/s collides head on, elastically, with a 2 kg ball moving at 1 m/s. What will be the velocity of each ball after the collision
In a study of hydrogen halide decomposition, 0.200mol hydrogen iodide is placed in a 2.00L flask and the temperature raised to 4530C. At equilibrium, [HI] = 0.078M. Calculate Kc.
Water vapor will react reversibly with methane (CH4) to produce carbon monoxide and hydrogen gas. The equilibrium, with a Kc = 0.26, is established at 9270C in a 0.32L flask which contains 0.26mol C
The organic chemical butane (C4H10) will undergo reversible rearrangement to form isobutene (C4H10) with Kc = 2.5 under certain reaction conditions
The conversion of sulfur dioxide into sulfur trioxide with oxygen gas must be closely monitored during the manufacture of sulfuric acid. The Kc = 1.7 x 104 at exactly 600K. If PSO3 = 300atm and PO2
At high temperature, hydrogen and carbon dioxide will reversibly react to form carbon monoxide and water vapor. At 986oC there are 0.11mol of each product and 0.087mol of each reagent in a 1.00L fla