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Part A: Thymolphthalein is an indicator that changes color over a range from pH = 9.3 to pH = 10.5 . What is Ka of thymolphthalein. Part B: Alizarin yellow R, Ka=7.9x10^-12, is yellow in its protona
A beam of protons at an accelerator creates a current of 120 mu/A. how many protons strike the target in 30.0 s
The solubility constant of TlBr is Ksp = 3.6 × 10-6 and the solubility constant of AgBr is Ksp = 5.0 × 10-13. Determine the range of NaBr volumes over which each solid precipitates.
What is the pH (to nearest 0.01 pH unit) of a solution prepared by mixing 80.0 mL of 0.529 M HCl and 46.0 mL of 1.150 M NaOH? pH = What is the pH (to nearest 0.01 pH unit) of a solution prepared by
assume that a proof plane is a conducting disc with a radius of 1.0 cm and is used to transfer some charge from the sphere described above. How much charge will be transferred in one scoop
Calculate the change in pH to 0.01 pH units caused by adding 10. mL of 2.72-M NaOH is added to 490. mL of each of the following solutions. a) water pH before mixing
An automobile starter motor has an equivalent resistance of 0.0470 and is supplied by a 12.0 V battery with a 0.0120 internal resistance. What is the current to the motor
A 1.241-g sample of a solid, weak, monoprotic acid is used to make 100.0 mL of solution. 50.0 mL of this solution was titrated with 0.08126-M NaOH. The pH after the addition of 30.29 mL of base was
The hot resistance of a flashlight bulb is 1.90 , and it is run by a 1.53 V alkaline cell having a 0.100 internal resistance. Calculate the power supplied to the bulb
Your car's 29.5 W headlight and 2.35 kW starter are ordinarily connected in parallel in a 12.0 V system. What power would one headlight and the starter consume
A 5 kg block has an initial speed of 10m/s down a frictionless include plane. Determine the amount by which the spring compress
Find the rms voltage across each element in an RLC circuit with R = 9.2k ohm, C= 0.13 uF, and L= 25mH. kH
A series RLC circuit has components with following values: L = 20.0 mH, C = 100 nF, R = 20.0 Ohm, and dVmax = 100 V, Calculate the average power in the resistor at resonance
A 70.0Hz generator with an rms voltage of 165Vis connected in series to a 3.35k ohm resistor and a 2.5uF capacitor, Find the phase angle between the current and the voltage
A particle of mass 7.22 x 10^-27 kg, moving at 7.06 x 10^5 m/s, strike an identical particle which is initially at rest. What are the final speeds of the particles
A spaceship moves away from Earth at a speed 0.417 c and fires a shuttle craft that then moves in a forward direction at 0.701 c relative to the ship. determine the speed of the pribe realitive to e
Two particles, one with charge -7.13 %u03BCC and one with charge 7.75 %u03BCC, are 3.59 centimeters apart. What is the magnitude of the force that one particle exerts on the other
A 500-turn solenoid is 23 cm long, 1.5 cm in diameter, and carries 65 mA. How much magnetic energy does it contain
A large power plant generates electricity at 12.0 kV. Its old transformer once converted the voltage to 395 kV. If the upgraded transmission lines have the same resistance, what is the ratio of new li
What is the pH of the solution after the addition of 30.0 mL of acid? pH = e) What is the pH of the solution after the addition of 52.9 mL of acid
Assuming a typical efficiency for energy use by the body, how many slices of pizza must you eat to walk for 1.5hr at a speed of 5.0 km/hr
An epoxide is: Student Response Value Correct Answer Feedback A. any compound with a three-membered ring B. basically a cyclopropane C. any compound with a three-membered ring containing oxygen D. a
What is the total molar concentration of all the ions in 0.020 M solutions of the following salts in water. 0.020 M KCl = ____ M ions 0.020 M CuSO4 = ____ M ions 0.020 M CaCl2 = ____ M ions
What is the molar concentration of Na+ ions in 0.035 M solutions of the following sodium salts in water
A star is moving away from Earth at a speed of 2.3x10^8 m/s. find the wavelength as measured by an Earth observer