1) What is the wavelength (in meters) of an electromagnetic wave of frequency 2812571875.00MHz?(adsbygoogle = window.adsbygoogle || []).push({});

Example: 1.11e-5

LAMBDA = c/v

=(3.00*10^8 m/s)/(2812571875.00MHz*10^6 Hz/MHz) = 1.07E-7 m??

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2) What is the wavelength (in meters) of an electromagnetic wave of frequency 7084.00MHz?

LAMBDA = c/v

=(3.00*10^8 m/s)/(7084.00MHz*10^6 Hz/MHz) = 4.23E-1 m??

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3) How much energy is carried by a mole of photons with frequency 704.00MHz?

Give your answer in kilojoules per mole, Example: 1.11e-5

Careful with your conventions.

E = hv

=(6.626*10^-34)*(704.00MHz*10^6 Hz/MHz) = 4.665E-25 J

4.665E-25 J(1 kJ/10^-3 J)* (6.02*10^23 photons/1mol) = 2.81E-4 kJ/mol??

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Did I express my answers with the right significant digits and calculations?

Thanks.

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# Wavelength, Frequency, and Planck's Constant

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