When an electric current is passed through a tube containing hydrogen, hydrogen atoms absorb some of...
400 nm Violet Blue In a discharge tube, nitrogen atoms emit light as they undergo transitions from one energy level to another that is 4.845x10-19 J lower in energy. Calculate the wavelength of the light emitted and by referring to the figure to the right, predict the color of the line in the discharge spectrum. Green 500 nm Yellow Wavelength- 600 nmm Orange Color- Red 700 nm Submit Answer 5 question attempts remaining
The following reaction takes place when an electric current is passed through water. It is an example of a reaction 2H200 dolary, 2H2(g) + O2(g) Select one: A decomposition O 8. combination OC. combustion O D. double replacement E single replacement What is the molar mass, to three significant figures, of sodium phosphate, NagPO4? Select one: O A. 2269 8.354 g O C. 1190 D. 1640 E. 308 g How many moles of water, H20, are present in 75.0 g...
x rays are produced when: a. electric current flows through the x ray tube filament b. projectile electrons bounch off the cathode c. the outer shell electron binding energy d. the mass of filtration e the orientation of the target
Electric current passed through two coulometers connected in series.The first one contained a solution of a metal-nitrate, the second one a solution of H2SO4. After some time 0,675 g of the unknown metal could be found on a Pt electrode of the first coulometer and 73,1 cm3 of hydrogen (16°C, 770 Torr) were created on the Pt electrode of the second coulometer. What was the unknown metal?
13. The following reaction takes place when an electric current is passed through 2 H2O → O2 + 2 H2O It is an example of a .... .....reaction. 14. What is oxidized and what is reduced in the following reaction? 2 Al(s) + 3 Br2(i) → 2 AlBr3
4.. Some streets lamps emit only yellow light. At night when illuminated by a street light emitting yellow light, what color does a blue car appear? Group of answer choices a. black b. blue c. green d. colorless 5... The energy required to promote an electron from the n = 1 to the n = 6 shell in a hydrogen atom is 2.12 x 10–18 J. A photon of this energy has what wavelength in meters? Group of answer choices...
1.. An alternating current, when passed through a resistor immersed in water for 5 min, just raised the temperature of the water to boiling point. When a direct current of 4 A was passed through the same resistor under identical conditions, it took 8 min to boil the water. Find the r.m.s. value of the alternating current. Neglect factors other than heat given to the water. If a rectifier type of ammeter connected in series with the resistor read 5.2...
n) A constant current of 6.00 amp is passed through a solution containing NaCl(aq) .for 12.0 2 e minutes. During this time, the CI(aq) is oxidized via 2 CI(Clh+ and the resulting Cl(g) is collected. What is the volume of the Cl2(g), expressed in mL, if its pressure is 0.700 atm. and its temperature is 21.0°C? Assume 100% current efficiency, and assume that the gas is ideal. Data: R 8.3145 J/(K mol) -0.0821 L atm/(K mol), faraday 96,500 coulombs.
Three resistors with color codes 1. Brown, Brown, Brown, 2. Red, Red, Red 3. Orange, Black, Orange are connected in parallel. A battery of voltage 4.5 V is connected to the resistors. a) Draw the circuit diagram. b) List the values of the resistors according to color code. c) Calculate the equivalent resistance 1st Digit d) Find the current through each resistor e) Add the currents through each resistor to find the total current and use the voltage to find...
the ratio of the electric potential across a circuit element to the current flowing through that element is called: a. current b. energy c. power d. resistance e. voltage when electrons move in a copper wire: a. resistance to the electron flow exists b. ionization occurs c. the condition is called electromagnetic force d. the condititon is called electrostatics e. they move down the middle of the wire