1045 Fa06Test 4 ans - pink version

1045 Fa06Test 4 ans - pink version - Name Recitation...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Name Recitation Section .. CHM1045C Fall 06 Test 4 Monday 20 th November 45 minutes Pink Show all your working to gain full credit. Equations and constants you may find useful : - c = 3 x 10 8 m/s h = 6.6 x 10 34 J.s E(photon) = h c = N A = 6 x 10 23 /mole Rydberg constant = 1.1 x 10 7 /m de Broglie = h / mv electron mass = 9.1 x 10 31 kg 1 Calculate the frequency of infra-red light of wavelength 920nm. = c/ = 3 x 10 8 m/s / 920 x 10 9 m = 3.26 x 10 14 Hz 3 2 Calculate the energy of a blue photon ( = 400nm). E = h = h.c/ = h x 3 x 10 8 m/s / 400x 10 9 m = 4.95 x 10 19 J 4 3 Calculate the energy of 2 mol of green photons ( = 6 x 10 14 Hz) E = h per photon = n.h for n photons = 2 x 6 x 10 23 photons x 6.6 x 10 34 J.s x 6 x 10 14 = 475kJ 4 4 Use the Rydberg equation {1/ = R( 1/n 1 2 1/n 2 2 ) }to calculate the wavelength of a photon emitted by a hydrogen atom changing from the level n = 5 to n = 3. a photon emitted by a hydrogen atom changing from the level n = 5 to n = 3....
View Full Document

Page1 / 3

1045 Fa06Test 4 ans - pink version - Name Recitation...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online