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The red light of neon signs has a wavele...

The red light of neon signs has a wavelength of 693 nm. Find the energy difference (per mole of atoms) between the two energy levels involved.

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`E=hv=(hc)/(lamda)=(6.625xx10^(-34)Jsxx3xx10^(8)ms^(-1))/(693xx10^(-9)m)=2.8684xx10^(15)J`
Energy difference per mole of atoms `=2.8684xx10^(15)xx6.022xx10^(23)`
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