Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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If the energy of a photon is 3.28 x 10^-19 J, what is it's wavelength in nm
(nanometers)?
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- A laser pointer used in the classroom emits light at 4950 Å, at a power of 4.00 mW. (One watt is the SI unit of power, the measure of energy per unit of time. 1 W = 1 J/s). How many photons are emitted from the pointer in 115 seconds?arrow_forwardA hydrogen atom undergoes a transition from the n = 8 level. Calculate the shortest possible wavelength (in units of nm) of electromagnetic radiation emitted by the hydrogen atom. Your answer must be in units of nanometers. c = v) E = hv E = -(Rµ/n²) X= (h/mu) AE = -RH ((1/n;3) – (1/n²)] (1/A) = (Rµ/hc) [(1/n}) – (1/n²)] %3D c = 2.9979 x 108 m · s-1 h = 6.6260 x 10-34 j.s RH = 2.1798 x 10–18, 1 pm 1x 10 12 m 1 nm = 1x 10-9 m 1 Á = 1x 10-10 m %3D %3D NA = 6.0221 x 1023/ molarrow_forwardwhat is the wavelength of light with a frequency of 2.59 x 10^15 Hz?arrow_forward
- If the energy of a photon is 7.02x10^-19 J, what is its wavelength in nanometers?arrow_forwardAn atom requires 6.24 × 10^-19J to remove its furthest electron in the gas phase. What is the maximum wavelength of electromagnetic radiation that will result in ionization? Report your numerical answer in units of nm. Use significant figures. h = 6.626 x 10^-34 m^2 kg/s ; c = 2.998 x 10^8 m/s.arrow_forwardIf the energy of a photon is 3.13 x 1019 J, what is it's wavelength in nm (nanometers)?arrow_forward
- 2. A laser pointer used in the classroom emits light at 6550 A, at a power of 4.00 mW. (One watt is the SI unit of power, the measure of energy per unit of time. 1 W = 1 J/s). How many photons are emitted from the pointer in 115 seconds?arrow_forwardAn atom of argon is moving in a container with a speed of 309.9 m/s. Determine its wavelength (in units of nm). Your answer must be in units of nanometers. molar mass atomic argon = 39.948 g/mol C = v) E = hv E=-(R/n?) X= (h/mu) AE = –RH [(1/n) – (1/n;²)] (1/A) = (Rµ/hc) [(1/n) – (1/n,?)] %3D %3D c = 2.9979 x 10³ m·s-1 h = 6.6260x 10 34 j.s %3D RH = 2.1798 x 1018 J 1 pm = 1x 10-12 m 1 nm = 1x 10-9m %3D 1 Å = 1x 10-10 m %3D NA = 6.0221 x 1023/ mol %3Darrow_forwardDetermine the energy of a photon with a wavelength of 317 nm. (h = 6.626 × 10⁻³⁴ J • s and c = 3.00 × 10⁸ m/s)arrow_forward
- If an electron were to move from n=4 to n=2 and produce light with a wavelength of 580 nm, what is the wavelength equivalent in meters?arrow_forward9.966×106 m What is the wavelength of this radiation in miles?arrow_forwardDetermine the energy, in J, of a photon with a wavelength of 327 nm. (h = 6.626 × 10⁻³⁴ J • s and c = 3.00 × 10⁸ m/s)arrow_forward
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