questions are from(Chemistry Structure and Properties) book, and they are just basic practice question

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Part A Constants Periodic Table You may want to reference (Pages 76 - 85) Section 2.2 while completing this problem. How much energy is contained in 1 mol of each of the following? X-ray photons with a wavelength of 0.135 nm Express the energy numerically in kilojoules per mole. IVO ALO ? E = kJ/mol Submit Request Answer Part B 7-ray photons with a wavelength of 2.69x10-5 nm Express the energy numerically in kilojoules per mole. ΟΙ ΑΣφ ? E = kJ/mol Submit Request Answer Provide Feedback Part A Constants Periodic Table A laser pulse with wavelength 515 nm contains 4.40 mJ of energy. How many photons are in the laser pulse? IVO AKO ? N = Submit Request Answer Provide Feedback Constants Periodic Table You may want to reference (Pages 76 - 85) Section 2.2 while completing this problem. The distance from Earth to the sun is 1.5 x 108 km Part A Find the number of crests in a light wave with a frequency of 1.4x1014 s traveling from the sun to Earth. Express your answer using two significant figures. IVO AEO ? N = Submit Request Answer Provide Feedback Exercise 2.50 - Enhanced - with Feedback Part A Constants | Periodic Table The smallest atoms can themselves exhibit quantum mechanical behavior. You may want to reference (Pages 88 - 93) Section 2.4 while completing this problem. Calculate the de Broglie wavelength (in picometers) of a hydrogen atom traveling at 460 m/s. Express your answer using three significant figures. IVO AEO ? X= pm Submit Request Answer Provide Feedback Part A Constants Periodic Table A heat lamp produces 25.5 watts of power at a wavelength of 5.7 um. You may want to reference (Pages 76 - 85) Section 2.2 while completing this problem. How many photons are emitted per second? (1 W=1J/s.) Express your answer to three significant figures. EVO AEO ? N = photons/s Submit Request Answer Provide Feedback Part A Constants Periodic Table A heat lamp produces 25.5 watts of power at a wavelength of 5.7 um. You may want to reference (Pages 76 - 85) Section 2.2 while completing this problem. How many photons are emitted per second? (1 W=1J/s.) Express your answer to three significant figures. EVO AEO ? N = photons/s Submit Request Answer Provide Feedback Part A Constants Periodic Table An electron traveling at 3.4 105 m/s has an uncertainty in its velocity of 1.74x105 m/s. You may want to reference (Pages 88 - 93) Section 2.4 while completing this problem. What is the uncertainty in its position? Express your answer with the appropriate units. μΑ ? ΔΥΣ Value Units Submit Request Answer Provide Feedback Part A Constants Periodic Table The human eye contains molecule called 11-cis-retinal that changes shape when struck with light of sufficient energy. The change in shape triggers a series of events that results in an electrical signal being sent to the brain that results in vision. The minimum energy required to change the conformation of 11-cis-retinal within the eye is about 164 kJ/mol. You may want to reference (Pages 76 - 85) Section 2.2 while completing this problem. Calculate the longest wavelength visible to the human eye. Express the wavelength in nanometers to three significant figures. IVO ALO ? X= nm Submit Request Answer Provide Feedback Part A Constants Periodic Table In order for a thermonuclear fusion reaction of two deuterons (H') to take place, the deuterons must collide and each must have a velocity of about 1 x 106 m/s. Find the wavelength of such a deuteron. Express the wavelength in meters to two significant figures. You may want to reference (Pages 88 - 93) Section 2.4 while completing this problem. ΟΙ ΑΣΦ X = m Submit Request Answer Provide Feedback Part A How much energy in J) is contained in 1.00 mole of 747 nm photons? 1.60 x 105 J 2.66 x 10-19 J 4.42 x 10 43 J 2.66 x 10-28J Submit Request Answer Provide Feedback
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Explanation & Answer

please find answer of your questions...in second block of questions ,there was more of repetition of question of first block.



Answer A 1.6  10 5 J



Uncertainty in position

x 

h
1
6.626  10 34
1



 3.326  10 10
31
4 mv
4
9.11  10  1.74  10 5

Number of photons


E (heat Lamp) 25.5 25.5
25.5  5.7  10 6



 7.31  10 20
hc
E  photon 
hc
6.626  10 34  3  10 8



The de Broglie wavelength (  ) is associated with mass of the particle (m) and velocity
of the particle as follows:



h
; Where h is the Planck’s constant with its value 6.636  10 34 Js
m

Mass of one H atom is 1...


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Awesome! Made my life easier.

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